mxc nand: Access all ecc_status_result fields

On the NFC IP 1.1, the 32-bit ecc_status_result value comes from 2
consecutive 16-bit registers. This patch reads all the fields of this value,
which makes a difference for 4-kiB NF pages.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Cc: Scott Wood <scottwood@freescale.com>
Cc: Stefano Babic <sbabic@denx.de>
Signed-off-by: Scott Wood <scottwood@freescale.com>
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 62d8c6b..4564b25 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -653,7 +653,7 @@
 {
 	struct nand_chip *nand_chip = mtd->priv;
 	struct mxc_nand_host *host = nand_chip->priv;
-	uint16_t ecc_status = readw(&host->regs->ecc_status_result);
+	uint32_t ecc_status = readl(&host->regs->ecc_status_result);
 	int subpages = mtd->writesize / nand_chip->subpagesize;
 	int pg2blk_shift = nand_chip->phys_erase_shift -
 			   nand_chip->page_shift;