mtd: nand: mediatek: return error code of nand_scan_ident/tail() on error

The nand_scan_ident/tail() returns an appropriate error value when
it fails. Use it instead of the fixed error code -ENODEV.

Signed-off-by: Masahiro Yamada <[e-mail]>
Reviewed-by: Marek Vasut <[e-mail]>
Signed-off-by: Boris Brezillon <[e-mail]>

drivers/mtd/nand/mtk_nand.c

···
 
 	ret = nand_scan_ident(mtd, nsels, NULL);
 	if (ret)
-		return -ENODEV;
+		return ret;
 
 	/* store bbt magic in page, cause OOB is not protected */
 	if (nand->bbt_options & NAND_BBT_USE_FLASH)
···
 
 	ret = nand_scan_tail(mtd);
 	if (ret)
-		return -ENODEV;
+		return ret;
 
 	ret = mtd_device_parse_register(mtd, NULL, NULL, NULL, 0);
 	if (ret) {