mtd: nand: mpc5121: return error code of nand_scan() on error

The nand_scan() returns an appropriate error value when it fails.
Use it instead of the fixed error code -ENXIO.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>

drivers/mtd/nand/mpc5121_nfc.c

@@ -777,9 +777,9 @@ static int mpc5121_nfc_probe(struct platform_device *op)
 	}
 
 	/* Detect NAND chips */
-	if (nand_scan(mtd, be32_to_cpup(chips_no))) {
+	retval = nand_scan(mtd, be32_to_cpup(chips_no));
+	if (retval) {
 		dev_err(dev, "NAND Flash not found !\n");
-		retval = -ENXIO;
 		goto error;
 	}