mtd: rawnand: arasan: Support NV-DDR interface

[ Upstream commit 4edde603 ]

Add support for the NV-DDR interface.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210505213750.257417-23-miquel.raynal@bootlin.com


Signed-off-by: Sasha Levin <sashal@kernel.org>