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/mmc.h b/include/linux/mmc/mmc.h
index ac26a68..5bade06 100644
--- a/include/linux/mmc/mmc.h
+++ b/include/linux/mmc/mmc.h
@@ -21,8 +21,8 @@
  *          15 May 2002
  */
 
-#ifndef MMC_MMC_H
-#define MMC_MMC_H
+#ifndef LINUX_MMC_MMC_H
+#define LINUX_MMC_MMC_H
 
 /* Standard MMC commands (4.1)           type  argument     response */
    /* class 1 */
@@ -327,5 +327,4 @@
 #define MMC_SWITCH_MODE_CLEAR_BITS	0x02	/* Clear bits which are 1 in value */
 #define MMC_SWITCH_MODE_WRITE_BYTE	0x03	/* Set target to value */
 
-#endif  /* MMC_MMC_PROTOCOL_H */
-
+#endif /* LINUX_MMC_MMC_H */