fix(vd960DBN): 修复 offlog 编译错误 — 声明补齐 + RCC 宏移入公共头

MRS 编译报错:
1. offlog.c: SPI_Flash_Erase_Sector 隐式声明 → storage.h 补声明
2. peripheral_main.c: OFFLOG_RCC_RSTSCKR 未声明 → RCC 宏从 offlog.c
   移到 offlog.h (peripheral_main.c 只 include offlog.h)
3. offlog.c 删除本地重复 RCC 宏定义

单测重跑 ALL PASS

vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/include/storage.h

@@ -33,6 +33,7 @@ void load_cfg_from_flash(void);
 void SPI_Flash_Read(uint8_t *pBuffer, uint32_t ReadAddr, uint16_t size);
 void SPI_Flash_Write(uint8_t *pBuffer, uint32_t WriteAddr, uint16_t size);
 void SPI_Flash_Write_NoCheck(uint8_t *pBuffer, uint32_t WriteAddr, uint16_t size);
+void SPI_Flash_Erase_Sector(uint32_t Dst_Addr);
 
 void storage_init(void);