mtd/fsl_elbc: take NAND_ECC_SOFT_BCH config option into account

NAND_ECC_SOFT was the only option available while the SOFT_BCH option
may also be used.

Signed-off-by: Valentin Longchamp <valentin.longchamp@keymile.com>
Acked-by: Scott Wood <scottwood@freescale.com>
diff --git a/drivers/mtd/nand/fsl_elbc_nand.c b/drivers/mtd/nand/fsl_elbc_nand.c
index 7952097..2f31fc9 100644
--- a/drivers/mtd/nand/fsl_elbc_nand.c
+++ b/drivers/mtd/nand/fsl_elbc_nand.c
@@ -759,8 +759,12 @@
 		nand->ecc.steps = 1;
 		nand->ecc.strength = 1;
 	} else {
-		/* otherwise fall back to default software ECC */
+		/* otherwise fall back to software ECC */
+#if defined(CONFIG_NAND_ECC_BCH)
+		nand->ecc.mode = NAND_ECC_SOFT_BCH;
+#else
 		nand->ecc.mode = NAND_ECC_SOFT;
+#endif
 	}
 
 	ret = nand_scan_ident(mtd, 1, NULL);