mtd: utilize `mtd_is_*()' functions

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@intel.com>
diff --git a/drivers/mtd/nand/nand_bbt.c b/drivers/mtd/nand/nand_bbt.c
index 7dbfce4..584bdcb 100644
--- a/drivers/mtd/nand/nand_bbt.c
+++ b/drivers/mtd/nand/nand_bbt.c
@@ -400,7 +400,7 @@
 
 	ret = scan_read_raw_oob(mtd, buf, offs, readlen);
 	/* Ignore ECC errors when checking for BBM */
-	if (ret && ret != -EUCLEAN && ret != -EBADMSG)
+	if (ret && !mtd_is_bitflip_or_eccerr(ret))
 		return ret;
 
 	for (j = 0; j < len; j++, buf += scanlen) {
@@ -430,7 +430,7 @@
 		 */
 		ret = mtd->read_oob(mtd, offs, &ops);
 		/* Ignore ECC errors when checking for BBM */
-		if (ret && ret != -EUCLEAN && ret != -EBADMSG)
+		if (ret && !mtd_is_bitflip_or_eccerr(ret))
 			return ret;
 
 		if (check_short_pattern(buf, bd))