sh: Add header file for interface of SH MMC

This defines the mmcif_mmc_init which is an MMC function of SH.

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

arch/sh/include/asm/mmc.h

@@ -0,0 +1,18 @@
+/*
+ * Renesas SuperH MMCIF driver.
+ *
+ * Copyright (C)  2012 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
+ * Copyright (C)  2012 Renesas Solutions Corp.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License.
+ *
+ */
+#ifndef _SH_MMC_H_
+#define _SH_MMC_H_
+
+int mmcif_mmc_init(void);
+
+#endif /* _SH_MMC_H_ */
+