EXYNOS: SMDK5250: Add MMC SPL support

This patch adds support for MMC SPL booting.

Signed-off-by: Chander Kashyap <chander.kashyap@linaro.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/board/samsung/smdk5250/Makefile b/board/samsung/smdk5250/Makefile
index 80e8be3..226db1f 100644
--- a/board/samsung/smdk5250/Makefile
+++ b/board/samsung/smdk5250/Makefile
@@ -29,7 +29,14 @@
 COBJS	:= clock_init.o
 COBJS	+= dmc_init.o
 COBJS	+= tzpc_init.o
+
+ifndef CONFIG_SPL_BUILD
 COBJS	+= smdk5250.o
+endif
+
+ifdef CONFIG_SPL_BUILD
+COBJS	+= mmc_boot.o
+endif
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS) $(SOBJS))