make: move stm32f0-specific CFLAGS and LDFLAGS

Makefile

@@ -15,7 +15,6 @@ all: $(BUILD)/tbm
 CFLAGS += -Iinclude
 CFLAGS += -Wall -Wundef -Wextra -Wshadow -Wimplicit-function-declaration
 CFLAGS += -Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes
-CFLAGS += -fno-common --function-sections -fdata-sections
 
 obj-y += source/main.o
 obj-y += source/shell.o
@@ -48,6 +47,6 @@ $(BUILD)/%.o: %.c
 $(BUILD)/tbm: $(obj) $(LDSCRIPT)
 	@echo "LD $@"
 	@mkdir -p $(dir $@)
-	@$(LD) -o $@ $(CFLAGS) $(LDFLAGS) -T $(LDSCRIPT) $(obj) $(LIBS)
+	@$(LD) -o $@ $(CFLAGS) $(LDFLAGS) $(obj) $(LIBS)
 
 .PHONY: clean

scripts/Makefile.stm32f0

@@ -2,8 +2,10 @@ PREFIX ?= arm-none-eabi
 
 LDSCRIPT = support/stm32f0-discovery.ld
 
+CFLAGS += -fno-common --function-sections -fdata-sections
 LDFLAGS += -static -nostartfiles
 LDFLAGS += -Wl,--gc-sections
+LDFLAGS += -T ${LDSCRIPT}
 LIBS += -Wl,--start-group -lc -lgcc -lnosys -Wl,--end-group
 
 # Set up libopencm3.