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/Makefile b/Makefile
index 36246b6..648d477 100644
--- a/Makefile
+++ b/Makefile
@@ -735,6 +735,7 @@
 	       $(obj)tools/gdb/{astest,gdbcont,gdbsend}			  \
 	       $(obj)tools/gen_eth_addr    $(obj)tools/img2srec		  \
 	       $(obj)tools/mk{env,}image   $(obj)tools/mpc86x_clk	  \
+	       $(obj)tools/mk{smdk5250,}spl				  \
 	       $(obj)tools/ncb		   $(obj)tools/ubsha1
 	@rm -f $(obj)board/cray/L1/{bootscript.c,bootscript.image}	  \
 	       $(obj)board/matrix_vision/*/bootscript.img		  \