[MMC] Support MMC version 4 cards

Version 4 of the MMC specification increased the version number of the
CID structure. None of the fields changed though so the only required
change is adding '4' to the approved list.
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

drivers/mmc/mmc.c

@@ -495,6 +495,7 @@ static void mmc_decode_cid(struct mmc_card *card)
 
 		case 2: /* MMC v2.0 - v2.2 */
 		case 3: /* MMC v3.1 - v3.3 */
+		case 4: /* MMC v4 */
 			card->cid.manfid	= UNSTUFF_BITS(resp, 120, 8);
 			card->cid.oemid		= UNSTUFF_BITS(resp, 104, 16);
 			card->cid.prod_name[0]	= UNSTUFF_BITS(resp, 96, 8);