mtd: rawnand: cadence: support 64-bit slave dma interface

mtd: rawnand: cadence: support 64-bit slave dma interface

32-bit accesses on 64-bit sdma trigger sdma_err in intr_status register.

Check dma capabilities before reading/writing from/to sdma interface.

Link: https://lore.kernel.org/all/b7e5ebb4-0de8-4958-9bc4-fe06ec4c3635@www.fastmail.com/t/
Signed-off-by: Valentin Korenblit <vkorenblit@sequans.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20221018093000.12072-1-vkorenblit@sequans.com