update all stm32 to use new enhance make

hw/bsp/stm32f2/boards/stm32f207nucleo/stm32f207nucleo.c

@@ -203,7 +203,7 @@ uint32_t board_millis(void)
 
 void HardFault_Handler (void)
 {
-  asm("bkpt");
+  __asm("BKPT #0\n");
 }
 
 // Required by __libc_init_array in startup code if we are compiling using

hw/bsp/stm32f2/family.mk

@@ -9,18 +9,17 @@ DEPS_SUBMODULES += \
 	$(ST_HAL_DRIVER)
 
 include $(TOP)/$(BOARD_PATH)/board.mk
+CPU_CORE ?= cortex-m3
 
 CFLAGS += \
+	-DCFG_TUSB_MCU=OPT_MCU_STM32F2
+
+GCC_CFLAGS += \
   -flto \
-  -mthumb \
-  -mabi=aapcs \
-  -mcpu=cortex-m3 \
-  -mfloat-abi=soft \
   -nostdlib -nostartfiles \
-  -DCFG_TUSB_MCU=OPT_MCU_STM32F2
 
 # mcu driver cause following warnings
-CFLAGS += -Wno-error=sign-compare
+GCC_CFLAGS += -Wno-error=sign-compare
 
 SRC_C += \
   src/portable/synopsys/dwc2/dcd_dwc2.c \
@@ -36,6 +35,3 @@ INC += \
   $(TOP)/$(ST_CMSIS)/Include \
   $(TOP)/$(ST_HAL_DRIVER)/Inc \
   $(TOP)/$(BOARD_PATH)
-
-# For freeRTOS port source
-FREERTOS_PORTABLE_SRC = $(FREERTOS_PORTABLE_PATH)/ARM_CM3