sh: sh7757lcr: Add MMC header file of SH

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/board/renesas/sh7757lcr/sh7757lcr.c b/board/renesas/sh7757lcr/sh7757lcr.c
index adae9ce..c8edad8 100644
--- a/board/renesas/sh7757lcr/sh7757lcr.c
+++ b/board/renesas/sh7757lcr/sh7757lcr.c
@@ -24,6 +24,7 @@
 #include <malloc.h>
 #include <asm/processor.h>
 #include <asm/io.h>
+#include <asm/mmc.h>
 #include <spi_flash.h>
 
 int checkboard(void)