mtd: mxc_nand: move ecc strengh setup before nand_scan_tail

Since commit 6a918bade9dab40aaef80559bd1169c69e8d69cb, the mxc_nand driver
fails with:

Driver must set ecc.strength when using hardware ECC

This is because nand_scan_tail checks for correct ecc strength
settings, so we must set them up before nand_scan_tail.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Cc: stable@vger.kernel.org [3.4+]
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/nand/mxc_nand.c

@@ -1465,12 +1465,6 @@ static int __init mxcnd_probe(struct platform_device *pdev)
 	else if (mtd->writesize == 4096)
 		this->ecc.layout = host->devtype_data->ecclayout_4k;
 
-	/* second phase scan */
-	if (nand_scan_tail(mtd)) {
-		err = -ENXIO;
-		goto escan;
-	}
-
 	if (this->ecc.mode == NAND_ECC_HW) {
 		if (nfc_is_v1())
 			this->ecc.strength = 1;
@@ -1478,6 +1472,12 @@ static int __init mxcnd_probe(struct platform_device *pdev)
 			this->ecc.strength = (host->eccsize == 4) ? 4 : 8;
 	}
 
+	/* second phase scan */
+	if (nand_scan_tail(mtd)) {
+		err = -ENXIO;
+		goto escan;
+	}
+
 	/* Register the partitions */
 	mtd_device_parse_register(mtd, part_probes,
 			&(struct mtd_part_parser_data){