We should be return -ENOMEM instead of success.

Fixes: 626994e0 ("mtd: nand: hynix: Add read-retry support for 1x nm MLC NANDs")
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: NRichard Weinberger <richard@nod.at>
Signed-off-by: NBoris Brezillon <boris.brezillon@free-electrons.com>