Merge pull request #2727 from HubertXie/master

[BSP][STM32] 增加RT_USING_CPU_FFS配置选项

bsp/stm32/libraries/Kconfig

@@ -39,4 +39,4 @@ config SOC_SERIES_STM32G0
 config SOC_SERIES_STM32H7
     bool
     select ARCH_ARM_CORTEX_M7
-    select SOC_FAMILY_STM32
\ No newline at end of file
+    select SOC_FAMILY_STM32

libcpu/Kconfig

@@ -4,6 +4,10 @@ config ARCH_CPU_64BIT
 config ARCH_ARM
     bool
 
+config RT_USING_CPU_FFS
+    bool
+    default n
+
 config ARCH_ARM_CORTEX_M
     bool
     select ARCH_ARM
@@ -18,6 +22,7 @@ config ARCH_ARM_CORTEX_M0
 config ARCH_ARM_CORTEX_M3
     bool
     select ARCH_ARM_CORTEX_M
+    select RT_USING_CPU_FFS
 
 config ARCH_ARM_MPU
     bool
@@ -26,10 +31,12 @@ config ARCH_ARM_MPU
 config ARCH_ARM_CORTEX_M4
     bool
     select ARCH_ARM_CORTEX_M
+    select RT_USING_CPU_FFS
 
 config ARCH_ARM_CORTEX_M7
     bool
     select ARCH_ARM_CORTEX_M
+    select RT_USING_CPU_FFS
 
 config ARCH_ARM_CORTEX_R
     bool