mmc: set rca to 1 for MMC cards

U-Boot currently sets MMC cards' RCA register to 0. This value is
reserved according to the specification. Use a value of 1 instead, just
like the Linux kernel.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Acked-by: NJaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: NPantelis Antoniou <panto@antoniou-consulting.com>

drivers/mmc/mmc.c

@@ -430,7 +430,7 @@ int mmc_complete_op_cond(struct mmc *mmc)
 	mmc->ocr = cmd.response[0];
 
 	mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
-	mmc->rca = 0;
+	mmc->rca = 1;
 
 	return 0;
 }