描述一下这个bug / Describe the bug

我准备使用 AT32F435 移植，编译失败报重复定义SystemCoreClock的错误。
查看发现 port/dwc2/usb_glue_at.c 中 定义了 SystemCoreClock
而在AT32新版库文件中，已提供 SystemCoreClock 定义
#define SystemCoreClock system_core_clock
参考：https://github.com/ArteryTek/AT32F435_437_Firmware_Library/blob/master/libraries/cmsis/cm4/device_support/system_at32f435_437.h v2.0.9 版本添加

复现步骤 / To Reproduce

将 CherryUSB 添加到项目，添加 Cmake 配置，编译不通过。

设备信息 / Target Device

芯片型号: AT32F435
引脚: PA11,PA12
USP IP: dwc2

日志 / Log

[build] XXX/libraries/cmsis/cm4/device_support/system_at32f435_437.h:41:42: error: conflicting types for 'system_core_clock'; have 'uint32_t' {aka 'long unsigned int'}
[build] 41 | #define SystemCoreClock system_core_clock
[build] | ^~~~~~~~~~~~~~~~~
[build] XXX/user/libs/CherryUSB/usb_glue_at.c:12:10: note: in expansion of macro 'SystemCoreClock'
[build] 12 | uint32_t SystemCoreClock;
[build] | ^~~~~~~~~~~~~~~
[build] XXX/user/libs/CherryUSB/usb_glue_at.c:10:21: note: previous declaration of 'system_core_clock' with type 'unsigned int'
[build] 10 | extern unsigned int system_core_clock;
[build] | ^~~~~~~~~~~~~~~~~

配置 / Configuration

No response

USB中断 / USB Interrupt

No response

缓存 / Cache

No response

商业 / Business

• 是 / Yes