Makefile: move some flags to spl/Makefile

Some flags are used for SPL (and TPL) build only.
This commit moves them from config.mk to spl/Makefile.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>

config.mk

@@ -95,20 +95,6 @@ RELFLAGS= $(PLATFORM_RELFLAGS)
 OBJCFLAGS += --gap-fill=0xff
 
 CPPFLAGS = $(KBUILD_CPPFLAGS) $(RELFLAGS)
-
-# Enable garbage collection of un-used sections for SPL
-ifeq ($(CONFIG_SPL_BUILD),y)
-CPPFLAGS += -ffunction-sections -fdata-sections
-LDFLAGS_FINAL += --gc-sections
-endif
-
-ifeq ($(CONFIG_SPL_BUILD),y)
-CPPFLAGS += -DCONFIG_SPL_BUILD
-ifeq ($(CONFIG_TPL_BUILD),y)
-CPPFLAGS += -DCONFIG_TPL_BUILD
-endif
-endif
-
 CPPFLAGS += $(UBOOTINCLUDE)
 CPPFLAGS += $(NOSTDINC_FLAGS) -pipe $(PLATFORM_CPPFLAGS)
 
@@ -129,11 +115,6 @@ AFLAGS := $(KBUILD_AFLAGS) $(CPPFLAGS)
 LDFLAGS += $(PLATFORM_LDFLAGS)
 LDFLAGS_FINAL += -Bstatic
 
-LDFLAGS_$(SPL_BIN) += -T $(obj)u-boot-spl.lds $(LDFLAGS_FINAL)
-ifneq ($(CONFIG_SPL_TEXT_BASE),)
-LDFLAGS_$(SPL_BIN) += -Ttext $(CONFIG_SPL_TEXT_BASE)
-endif
-
 #########################################################################
 
 export PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS

spl/Makefile

@@ -19,6 +19,15 @@ include $(srctree)/scripts/Kbuild.include
 CONFIG_SPL_BUILD := y
 export CONFIG_SPL_BUILD
 
+KBUILD_CPPFLAGS += -DCONFIG_SPL_BUILD
+ifeq ($(CONFIG_TPL_BUILD),y)
+KBUILD_CPPFLAGS += -DCONFIG_TPL_BUILD
+endif
+
+# Enable garbage collection of un-used sections for SPL
+KBUILD_CFLAGS += -ffunction-sections -fdata-sections
+LDFLAGS_FINAL += --gc-sections
+
 ifeq ($(CONFIG_TPL_BUILD),y)
 export CONFIG_TPL_BUILD
 SPL_BIN := u-boot-tpl
@@ -173,6 +182,11 @@ endif
 $(obj)$(SPL_BIN).bin:	$(obj)$(SPL_BIN)
 	$(OBJCOPY) $(OBJCFLAGS) $(SPL_OBJCFLAGS) -O binary $< $@
 
+LDFLAGS_$(SPL_BIN) += -T $(obj)u-boot-spl.lds $(LDFLAGS_FINAL)
+ifneq ($(CONFIG_SPL_TEXT_BASE),)
+LDFLAGS_$(SPL_BIN) += -Ttext $(CONFIG_SPL_TEXT_BASE)
+endif
+
 GEN_UBOOT = \
 	cd $(obj) && $(LD) $(LDFLAGS) $(LDFLAGS_$(@F)) $(__START) \
 		--start-group $(__LIBS) --end-group $(PLATFORM_LIBS) \