Commit 03e296f6 ("mtd: m25p80: use the SPI
nor framework") accidentally removed support for Dual SPI read transfers.
Add it back.
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Acked-by: NHuang Shijie <shijie8@gmail.com>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>