mtd: nand: pxa3xx: return error code of nand_scan_ident() on error

The nand_scan_ident() returns an appropriate error value when it
fails.  Use it instead of the fixed error code -ENODEV.
(This driver is already doing so for nand_scan_tail().)
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: NMarek Vasut <marek.vasut@gmail.com>
Signed-off-by: NBoris Brezillon <boris.brezillon@free-electrons.com>

drivers/mtd/nand/pxa3xx_nand.c

@@ -1680,8 +1680,9 @@ static int pxa3xx_nand_scan(struct mtd_info *mtd)
 	chip->ecc.strength = pdata->ecc_strength;
 	chip->ecc.size = pdata->ecc_step_size;
 
-	if (nand_scan_ident(mtd, 1, NULL))
-		return -ENODEV;
+	ret = nand_scan_ident(mtd, 1, NULL);
+	if (ret)
+		return ret;
 
 	if (!pdata->keep_config) {
 		ret = pxa3xx_nand_init(host);