mtd: rawnand: micron: Allow controllers to overload raw accessors

Some controller drivers do not support executing regular
nand_read/write_page_raw() helpers. For that, we created
nand_monolithic_read/write_page_raw() alternatives. Let's now allow
the driver to overload the ECC ->read/write_page_raw() hooks when
these hooks are supported.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Link: https://lore.kernel.org/linux-mtd/20200507105241.14299-14-miquel.raynal@bootlin.com

drivers/mtd/nand/raw/nand_micron.c

@@ -508,8 +508,10 @@ static int micron_nand_init(struct nand_chip *chip)
 			chip->ecc.read_page_raw = nand_read_page_raw_notsupp;
 			chip->ecc.write_page_raw = nand_write_page_raw_notsupp;
 		} else {
-			chip->ecc.read_page_raw = nand_read_page_raw;
-			chip->ecc.write_page_raw = nand_write_page_raw;
+			if (!chip->ecc.read_page_raw)
+				chip->ecc.read_page_raw = nand_read_page_raw;
+			if (!chip->ecc.write_page_raw)
+				chip->ecc.write_page_raw = nand_write_page_raw;
 		}
 	}