Some MTD sublayers/drivers are implementing ->_read/write_oob() and
provide dummy wrappers for their ->_read/write() implementations.
Let the core handle this case instead of duplicating the logic.
Signed-off-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: NRobert Jarzmik <robert.jarzmik@free.fr>
Acked-by: NBrian Norris <computersforpeace@gmail.com>
Reviewed-by: NMiquel Raynal <miquel.raynal@free-electrons.com>
Tested-by: NLadislav Michl <ladis@linux-mips.org>