mmc: omap_hsmmc: use mmc_get_blk_desc() to get the block device desc

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

drivers/mmc/omap_hsmmc.c

@@ -166,7 +166,7 @@ static unsigned char mmc_board_init(struct mmc *mmc)
 
 #if defined(CONFIG_OMAP54XX) || defined(CONFIG_OMAP44XX)
 	/* PBIAS config needed for MMC1 only */
-	if (mmc->block_dev.devnum == 0)
+	if (mmc_get_blk_desc(mmc)->devnum == 0)
 		vmmc_pbias_config(LDO_VOLT_3V0);
 #endif