mtd: nand: Fix a couple error codes

We accidentally return 1 on error instead of proper error codes.

Fixes: 07b23e3db9ed ("mtd: nand: Cleanup/rework the atmel_nand driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>

drivers/mtd/nand/atmel/nand-controller.c

@@ -1685,7 +1685,7 @@ static int atmel_nand_controller_init(struct atmel_nand_controller *nc,
 	nc->smc = syscon_node_to_regmap(np);
 	of_node_put(np);
 	if (IS_ERR(nc->smc)) {
-		ret = IS_ERR(nc->smc);
+		ret = PTR_ERR(nc->smc);
 		dev_err(dev, "Could not get SMC regmap (err = %d)\n", ret);
 		return ret;
 	}
@@ -1718,7 +1718,7 @@ atmel_smc_nand_controller_init(struct atmel_smc_nand_controller *nc)
 	nc->matrix = syscon_node_to_regmap(np);
 	of_node_put(np);
 	if (IS_ERR(nc->matrix)) {
-		ret = IS_ERR(nc->matrix);
+		ret = PTR_ERR(nc->matrix);
 		dev_err(dev, "Could not get Matrix regmap (err = %d)\n", ret);
 		return ret;
 	}