mtd: spinand: Use standard return values

Replace -ENOTSUPP with -EOPNOTSUPP which is as relevant in this case but
is standard.

Reviewed-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

Author: miquelraynal

drivers/mtd/nand/spi/core.c

@@ -1417,28 +1417,28 @@ int spinand_match_and_init(struct spinand_device *spinand,
 		op = spinand_select_op_variant(spinand,
 					       info->op_variants.read_cache);
 		if (!op)
-			return -ENOTSUPP;
+			return -EOPNOTSUPP;
 
 		spinand->op_templates.read_cache = op;
 
 		op = spinand_select_op_variant(spinand,
 					       info->op_variants.write_cache);
 		if (!op)
-			return -ENOTSUPP;
+			return -EOPNOTSUPP;
 
 		spinand->op_templates.write_cache = op;
 
 		op = spinand_select_op_variant(spinand,
 					       info->op_variants.update_cache);
 		if (!op)
-			return -ENOTSUPP;
+			return -EOPNOTSUPP;
 
 		spinand->op_templates.update_cache = op;
 
 		return 0;
 	}
 
-	return -ENOTSUPP;
+	return -EOPNOTSUPP;
 }
 
 static int spinand_detect(struct spinand_device *spinand)