mtd: nand: use mtd_set_ecclayout() where appropriate

Use the mtd_set_ecclayout() helper instead of directly assigning the
mtd->ecclayout field.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 24ed445..feb1448 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -4285,7 +4285,7 @@
 		ecc->write_oob_raw = ecc->write_oob;
 
 	/* propagate ecc info to mtd_info */
-	mtd->ecclayout = ecc->layout;
+	mtd_set_ecclayout(mtd, ecc->layout);
 	mtd->ecc_strength = ecc->strength;
 	mtd->ecc_step_size = ecc->size;