ARMV7: MMC SPL Boot support for SMDKV310 board

Added MMC SPL boot support for SMDKV310. This framework design is
based on nand_spl support.

Signed-off-by: Chander Kashyap <chander.kashyap@linaro.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/Makefile b/Makefile
index 0400930..08cf7fa 100644
--- a/Makefile
+++ b/Makefile
@@ -322,6 +322,10 @@
 ONENAND_BIN ?= $(obj)onenand_ipl/onenand-ipl-2k.bin
 endif
 
+ifeq ($(CONFIG_MMC_U_BOOT),y)
+ALL += $(obj)mmc_spl/u-boot-mmc-spl.bin
+endif
+
 all:		$(ALL)
 
 $(obj)u-boot.hex:	$(obj)u-boot
@@ -413,6 +417,11 @@
 $(obj)u-boot-onenand.bin:	onenand_ipl $(obj)u-boot.bin
 		cat $(ONENAND_BIN) $(obj)u-boot.bin > $(obj)u-boot-onenand.bin
 
+mmc_spl:	$(TIMESTAMP_FILE) $(VERSION_FILE) depend
+		$(MAKE) -C mmc_spl/board/$(BOARDDIR) all
+
+$(obj)mmc_spl/u-boot-mmc-spl.bin:	mmc_spl
+
 $(VERSION_FILE):
 		@( localvers='$(shell $(TOPDIR)/tools/setlocalversion $(TOPDIR))' ; \
 		   printf '#define PLAIN_VERSION "%s%s"\n' \
@@ -1123,6 +1132,7 @@
 	@rm -f $(obj)lib/asm-offsets.s
 	@rm -f $(obj)nand_spl/{u-boot.lds,u-boot-spl,u-boot-spl.map,System.map}
 	@rm -f $(obj)onenand_ipl/onenand-{ipl,ipl.bin,ipl.map}
+	@rm -f $(obj)mmc_spl/{u-boot.lds,u-boot-spl,u-boot-spl.map,u-boot-spl.bin,u-boot-mmc-spl.bin}
 	@rm -f $(ONENAND_BIN)
 	@rm -f $(obj)onenand_ipl/u-boot.lds
 	@rm -f $(TIMESTAMP_FILE) $(VERSION_FILE)
@@ -1147,6 +1157,7 @@
 	@rm -fr $(obj)include/generated
 	@[ ! -d $(obj)nand_spl ] || find $(obj)nand_spl -name "*" -type l -print | xargs rm -f
 	@[ ! -d $(obj)onenand_ipl ] || find $(obj)onenand_ipl -name "*" -type l -print | xargs rm -f
+	@[ ! -d $(obj)mmc_spl ] || find $(obj)mmc_spl -name "*" -type l -print | xargs rm -f
 
 ifeq ($(OBJTREE),$(SRCTREE))
 mrproper \