more makefile clean up

examples/rules.mk

@@ -22,6 +22,7 @@ INC += $(TOP)/src
 #
 CFLAGS += $(addprefix -I,$(INC))
 LDFLAGS += $(CFLAGS) -fshort-enums -Wl,-T,$(TOP)/$(LD_FILE) -Wl,-Map=$@.map -Wl,-cref -Wl,-gc-sections -specs=nosys.specs -specs=nano.specs
+ASFLAGS += $(CFLAGS)
 
 # Assembly files can be name with upper case .S, convert it to .s 
 SRC_S := $(SRC_S:.S=.s)

hw/bsp/feather_nrf52840_express/board.mk

@@ -35,9 +35,6 @@ INC += \
 SRC_S += hw/mcu/nordic/nrfx/mdk/gcc_startup_nrf52840.S
 
 ASFLAGS += -D__HEAP_SIZE=0
-ASFLAGS += -DSWI_DISABLE0
-ASFLAGS += -DFLOAT_ABI_HARD
-ASFLAGS += -DNRF52840_XXAA
 
 # For TinyUSB port source
 VENDOR = nordic

hw/bsp/pca10056/board.mk

@@ -35,9 +35,6 @@ INC += \
 SRC_S += hw/mcu/nordic/nrfx/mdk/gcc_startup_nrf52840.S
 
 ASFLAGS += -D__HEAP_SIZE=0
-ASFLAGS += -DSWI_DISABLE0
-ASFLAGS += -DFLOAT_ABI_HARD
-ASFLAGS += -DNRF52840_XXAA
 
 # For TinyUSB port source
 VENDOR = nordic