mmc: Standardize header file inclusion checks.

Standardize the checks for multiple MMC header file inclusion,
including adding comments to terminating #endif's, and fixing
one incorrect comment.

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Chris Ball <cjb@laptop.org>
diff --git a/include/linux/mmc/sh_mmcif.h b/include/linux/mmc/sh_mmcif.h
index 9eb9b4b..0222cd8 100644
--- a/include/linux/mmc/sh_mmcif.h
+++ b/include/linux/mmc/sh_mmcif.h
@@ -11,8 +11,8 @@
  *
  */
 
-#ifndef __SH_MMCIF_H__
-#define __SH_MMCIF_H__
+#ifndef LINUX_MMC_SH_MMCIF_H
+#define LINUX_MMC_SH_MMCIF_H
 
 #include <linux/io.h>
 #include <linux/platform_device.h>
@@ -220,4 +220,4 @@
 	sh_mmcif_boot_cmd(base, 0x03400040, 0x00010000);
 }
 
-#endif /* __SH_MMCIF_H__ */
+#endif /* LINUX_MMC_SH_MMCIF_H */