Apply flame#727 to RISC-V

Apply flame#727 to RISC-V

Details:
- Migrated all kernel APIs to use void* pointers instead of float*,
  double*, scomplex*, and dcomplex* pointers. This allows us to define
  many fewer kernel function pointer types, which also makes it much
  easier to know which function pointer type to use at any given time.
  (For example, whereas before there was ?axpyv_ker_ft, ?axpyv_ker_vft,
  and axpyv_ker_vft, now there is just axpyv_ker_ft, which is equivalent
  so what axpyv_ker_vft used to be.)
- Refactored how kernel function prototypes and kernel function types
  are defined so as to reduce redundant code. Specifically, the
  function signatures (excluding cntx_t* and, in the case of level-3
  microkernels, auxinfo_t*) are defined in new headers named, for 
  example, bli_l1v_ker_params.h. Those signatures are reused via macro 
  instantiation when defining both kernel prototypes and kernel function 
  types. This will hopefully make it a little easier to update, add, and 
  manage kernel APIs going forward.
- Updated all reference kernels according to the aforementioned switch
  to void* pointers.
- Updated all optimzied kernels according to the aforementioned switch
  to void* pointers. This sometimes required renaming variables,
  inserting typecasting so that pointer arithmetic could continue to
  function as intended, and related tweaks.
- Updated sandbox/gemmlike according to the aforementioned switch to
  void* pointers.
- Renamed:
  - frame/1/bli_l1v_ft_ker.h    -> frame/1/bli_l1v_ker_ft.h
  - frame/1f/bli_l1f_ft_ker.h   -> frame/1f/bli_l1f_ker_ft.h
  - frame/1m/bli_l1m_ft_ker.h   -> frame/1m/bli_l1m_ker_ft.h
  - frame/3/bli_l1m_ft_ukr.h    -> frame/3/bli_l1m_ukr_ft.h
  - frame/3/bli_l3_sup_ft_ker.h -> frame/3/bli_l3_sup_ker_ft.h
  to better align with naming of neighboring files.
- Added the missing "void* params" argument to bli_?packm_struc_cxk() in
  frame/1m/packm/bli_packm_struc_cxk.c. This argument is being passed
  into the function from bli_packm_blk_var1(), but wasn't being "caught"
  by the function definition itself. The function prototype for
  bli_?packm_struc_cxk() also needed updating.
- Reordered the last two parameters in bli_?packm_struc_cxk().
  (Previously, the "void* params" was passed in after the
  "const cntx_t* cntx", although because of the above bug the params
  argument wasn't actually present in the function definition.)

Details:
- Updated common.mk so that when --disable-shared option is given to
  configure:
  1. The -fPIC compiler flag is omitted from the individual
     configuration family members' CPICFLAGS variables (which are
     initialized in each subconfig's make_defs.mk file); and
  2. The BUILD_SYMFLAGS variable, which contains compiler flags needed
     to control the symbol export behavior, is left blank.
- The net result of these changes is that flags specific to shared
  library builds are only used when a shared library is actually
  scheduled to be built. Thanks to Nick Knight for reporting this issue.
- CREDITS file update.
- (cherry picked from commit 5f84130)

Updated configure to pass all shellcheck checks. (#729)

Details:
- Modified configure so that it passes all 'shellcheck' checks,
  disabling ones which we violate but which are just stylistic, or are
  special cases in our code.
- Miscellaneous other minor changes, such as rearranged redirections in
  long sed/perl pipes to look more natural.
- Whitespace tweaks.
- (cherry picked from 72c37eb)

Fixed bugs in scal2v ref kernel when alpha == 1. (#728)

Details:
- Fixed a typo bug in ref_kernels/1/bli_scal2v_ref.c where the
  conditional that was supposed to be checking for cases when alpha is
  equal to 1.0 (so that copyv could be used instead of scal2v) was
  instead erroneously comparing alpha against 0.0.
- Fixed another bug in the same function whereby BLIS_NO_CONJUGATE was
  erroneously being passed into copyv instead of the kernel's conjx
  parameter. This second bug was inert, however, due to the first bug
  since the "alpha == 0.0" case was already being handled, resulting in
  the code block never executing.
- (cherry picked from 60f3634)

Use 'void*' datatypes in kernel APIs. (#727)

Details:
- Migrated all kernel APIs to use void* pointers instead of float*,
  double*, scomplex*, and dcomplex* pointers. This allows us to define
  many fewer kernel function pointer types, which also makes it much
  easier to know which function pointer type to use at any given time.
  (For example, whereas before there was ?axpyv_ker_ft, ?axpyv_ker_vft,
  and axpyv_ker_vft, now there is just axpyv_ker_ft, which is equivalent
  so what axpyv_ker_vft used to be.)
- Refactored how kernel function prototypes and kernel function types
  are defined so as to reduce redundant code. Specifically, the
  function signatures (excluding cntx_t* and, in the case of level-3
  microkernels, auxinfo_t*) are defined in new headers named, for
  example, bli_l1v_ker_params.h. Those signatures are reused via macro
  instantiation when defining both kernel prototypes and kernel function
  types. This will hopefully make it a little easier to update, add, and
  manage kernel APIs going forward.
- Updated all reference kernels according to the aforementioned switch
  to void* pointers.
- Updated all optimzied kernels according to the aforementioned switch
  to void* pointers. This sometimes required renaming variables,
  inserting typecasting so that pointer arithmetic could continue to
  function as intended, and related tweaks.
- Updated sandbox/gemmlike according to the aforementioned switch to
  void* pointers.
- Renamed:
  - frame/1/bli_l1v_ft_ker.h    -> frame/1/bli_l1v_ker_ft.h
  - frame/1f/bli_l1f_ft_ker.h   -> frame/1f/bli_l1f_ker_ft.h
  - frame/1m/bli_l1m_ft_ker.h   -> frame/1m/bli_l1m_ker_ft.h
  - frame/3/bli_l1m_ft_ukr.h    -> frame/3/bli_l1m_ukr_ft.h
  - frame/3/bli_l3_sup_ft_ker.h -> frame/3/bli_l3_sup_ker_ft.h
  to better align with naming of neighboring files.
- Added the missing "void* params" argument to bli_?packm_struc_cxk() in
  frame/1m/packm/bli_packm_struc_cxk.c. This argument is being passed
  into the function from bli_packm_blk_var1(), but wasn't being "caught"
  by the function definition itself. The function prototype for
  bli_?packm_struc_cxk() also needed updating.
- Reordered the last two parameters in bli_?packm_struc_cxk().
  (Previously, the "void* params" was passed in after the
  "const cntx_t* cntx", although because of the above bug the params
  argument wasn't actually present in the function definition.)
- (cherry picked from fab18dc)

Use 'const' pointers in kernel APIs. (#722)

Details:
- Qualified all input-only data pointers in the various kernel APIs with
  the 'const' keyword while also removing 'restrict' from those kernel
  APIs. (Use of 'restrict' was maintained in kernel implementations,
  where appropriate.) This affected the function pointer types defined
  for all of the kernels, their prototypes, and the reference and
  optimized kernel definitions' signatures.
- Templatized the definitions of copys_mxn and xpbys_mxn static inline
  functions.
- Minor whitespace and style changes (e.g. combining local variable
  declaration and initialization into a single statement).
- Removed some unused kernel code left in 'old' directories.
- Thanks to Nisanth M P for helping to validate changes to the power10
  microkernels.
- (cherry picked from 93c63d1)

Details:
- Updated common.mk so that when --disable-shared option is given to
  configure:
  1. The -fPIC compiler flag is omitted from the individual
     configuration family members' CPICFLAGS variables (which are
     initialized in each subconfig's make_defs.mk file); and
  2. The BUILD_SYMFLAGS variable, which contains compiler flags needed
     to control the symbol export behavior, is left blank.
- The net result of these changes is that flags specific to shared
  library builds are only used when a shared library is actually
  scheduled to be built. Thanks to Nick Knight for reporting this issue.
- CREDITS file update.
- (cherry picked from 5f84130)

Updated configure to pass all shellcheck checks. (#729)

Details:
- Modified configure so that it passes all 'shellcheck' checks,
  disabling ones which we violate but which are just stylistic, or are
  special cases in our code.
- Miscellaneous other minor changes, such as rearranged redirections in
  long sed/perl pipes to look more natural.
- Whitespace tweaks.
- (cherry picked from 72c37eb)

Fixed bugs in scal2v ref kernel when alpha == 1. (#728)

Details:
- Fixed a typo bug in ref_kernels/1/bli_scal2v_ref.c where the
  conditional that was supposed to be checking for cases when alpha is
  equal to 1.0 (so that copyv could be used instead of scal2v) was
  instead erroneously comparing alpha against 0.0.
- Fixed another bug in the same function whereby BLIS_NO_CONJUGATE was
  erroneously being passed into copyv instead of the kernel's conjx
  parameter. This second bug was inert, however, due to the first bug
  since the "alpha == 0.0" case was already being handled, resulting in
  the code block never executing.
- (cherry picked from 60f3634)

Use 'void*' datatypes in kernel APIs. (#727)

Details:
- Migrated all kernel APIs to use void* pointers instead of float*,
  double*, scomplex*, and dcomplex* pointers. This allows us to define
  many fewer kernel function pointer types, which also makes it much
  easier to know which function pointer type to use at any given time.
  (For example, whereas before there was ?axpyv_ker_ft, ?axpyv_ker_vft,
  and axpyv_ker_vft, now there is just axpyv_ker_ft, which is equivalent
  so what axpyv_ker_vft used to be.)
- Refactored how kernel function prototypes and kernel function types
  are defined so as to reduce redundant code. Specifically, the
  function signatures (excluding cntx_t* and, in the case of level-3
  microkernels, auxinfo_t*) are defined in new headers named, for
  example, bli_l1v_ker_params.h. Those signatures are reused via macro
  instantiation when defining both kernel prototypes and kernel function
  types. This will hopefully make it a little easier to update, add, and
  manage kernel APIs going forward.
- Updated all reference kernels according to the aforementioned switch
  to void* pointers.
- Updated all optimzied kernels according to the aforementioned switch
  to void* pointers. This sometimes required renaming variables,
  inserting typecasting so that pointer arithmetic could continue to
  function as intended, and related tweaks.
- Updated sandbox/gemmlike according to the aforementioned switch to
  void* pointers.
- Renamed:
  - frame/1/bli_l1v_ft_ker.h    -> frame/1/bli_l1v_ker_ft.h
  - frame/1f/bli_l1f_ft_ker.h   -> frame/1f/bli_l1f_ker_ft.h
  - frame/1m/bli_l1m_ft_ker.h   -> frame/1m/bli_l1m_ker_ft.h
  - frame/3/bli_l1m_ft_ukr.h    -> frame/3/bli_l1m_ukr_ft.h
  - frame/3/bli_l3_sup_ft_ker.h -> frame/3/bli_l3_sup_ker_ft.h
  to better align with naming of neighboring files.
- Added the missing "void* params" argument to bli_?packm_struc_cxk() in
  frame/1m/packm/bli_packm_struc_cxk.c. This argument is being passed
  into the function from bli_packm_blk_var1(), but wasn't being "caught"
  by the function definition itself. The function prototype for
  bli_?packm_struc_cxk() also needed updating.
- Reordered the last two parameters in bli_?packm_struc_cxk().
  (Previously, the "void* params" was passed in after the
  "const cntx_t* cntx", although because of the above bug the params
  argument wasn't actually present in the function definition.)
- (cherry picked from fab18dc)

Use 'const' pointers in kernel APIs. (#722)

Details:
- Qualified all input-only data pointers in the various kernel APIs with
  the 'const' keyword while also removing 'restrict' from those kernel
  APIs. (Use of 'restrict' was maintained in kernel implementations,
  where appropriate.) This affected the function pointer types defined
  for all of the kernels, their prototypes, and the reference and
  optimized kernel definitions' signatures.
- Templatized the definitions of copys_mxn and xpbys_mxn static inline
  functions.
- Minor whitespace and style changes (e.g. combining local variable
  declaration and initialization into a single statement).
- Removed some unused kernel code left in 'old' directories.
- Thanks to Nisanth M P for helping to validate changes to the power10
  microkernels.
- (cherry picked from 93c63d1)