mmc: core: mmc_add_card(): fix missing break in switch statement

Fixes a cosmetic bug that affects printk() for SD-combo cards.

Reported-by: Prashanth Bhat <prashanth.bhat@manipal.net>
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Chris Ball <cjb@laptop.org>

drivers/mmc/core/bus.c

@@ -284,6 +284,7 @@ int mmc_add_card(struct mmc_card *card)
 		type = "SD-combo";
 		if (mmc_card_blockaddr(card))
 			type = "SDHC-combo";
+		break;
 	default:
 		type = "?";
 		break;