sh: Add header file of MMC framework

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

arch/sh/lib/board.c

@@ -25,6 +25,7 @@
 #include <version.h>
 #include <watchdog.h>
 #include <net.h>
+#include <mmc.h>
 #include <environment.h>
 
 #ifdef CONFIG_BITBANGMII