mmc: fix sg->page fallout

Signed-off-by: NEmil Medve <Emilian.Medve@Freescale.com>
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>

drivers/mmc/host/mmci.h

@@ -169,7 +169,7 @@ static inline char *mmci_kmap_atomic(struct mmci_host *host, unsigned long *flag
 	struct scatterlist *sg = host->sg_ptr;
 
 	local_irq_save(*flags);
-	return kmap_atomic(sg->page, KM_BIO_SRC_IRQ) + sg->offset;
+	return kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset;
 }
 
 static inline void mmci_kunmap_atomic(struct mmci_host *host, void *buffer, unsigned long *flags)