Implementing the mtd_ooblayout_ops interface is the new way of exposing
ECC/OOB layout to MTD users.
Signed-off-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: NHan Xu <han.xu@nxp.com>
Tested-by: NHan Xu <han.xu@nxp.com>