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>

drivers/mtd/nand/mxc_nand.c

@@ -653,7 +653,7 @@ static int mxc_nand_correct_data(struct mtd_info *mtd, u_char *dat,
 {
 	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;

include/fsl_nfc.h

@@ -94,8 +94,7 @@ struct fsl_nfc_regs {
 	u16 flash_addr;
 	u16 flash_cmd;
 	u16 config;
-	u16 ecc_status_result;
-	u16 ecc_status_result2;
+	u32 ecc_status_result;
 	u16 spare_area_size;
 	u16 wrprot;
 	u16 reserved3[2];

nand_spl/nand_boot_fsl_nfc.c

@@ -139,7 +139,11 @@ static void nfc_nand_data_output(void)
 
 static int nfc_nand_check_ecc(void)
 {
+#if defined(MXC_NFC_V1)
 	return readw(&nfc->ecc_status_result);
+#elif defined(MXC_NFC_V1_1)
+	return readl(&nfc->ecc_status_result);
+#endif
 }
 
 static void nfc_nand_read_page(unsigned int page_address)