[MMC] Add MMC command type flags

Some hosts need to know the command type, so pass it via a set of
flags in cmd->flags.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/include/linux/mmc/protocol.h b/include/linux/mmc/protocol.h
index a14dc30..81c3f77 100644
--- a/include/linux/mmc/protocol.h
+++ b/include/linux/mmc/protocol.h
@@ -79,7 +79,7 @@
 /* SD commands                           type  argument     response */
   /* class 8 */
 /* This is basically the same command as for MMC with some quirks. */
-#define SD_SEND_RELATIVE_ADDR     3   /* ac                      R6  */
+#define SD_SEND_RELATIVE_ADDR     3   /* bcr                     R6  */
 
   /* Application commands */
 #define SD_APP_SET_BUS_WIDTH      6   /* ac   [1:0] bus width    R1  */