pinctrl: ti: fix error return code of ti_iodelay_dt_node_to_map()

when devm_kcalloc fails, use -ENOMEM instead of -EINVAL,
and consistent with other devm_kcalloc return values.
Signed-off-by: Junlin Yang <yangjunlin@yulong.com>
Link: https://lore.kernel.org/r/20210330062655.1027-1-angkery@163.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/ti/pinctrl-ti-iodelay.c

@@ -511,8 +511,10 @@ static int ti_iodelay_dt_node_to_map(struct pinctrl_dev *pctldev,
 	}
 
 	pins = devm_kcalloc(iod->dev, rows, sizeof(*pins), GFP_KERNEL);
-	if (!pins)
+	if (!pins) {
+		error = -ENOMEM;
 		goto free_group;
+	}
 
 	cfg = devm_kcalloc(iod->dev, rows, sizeof(*cfg), GFP_KERNEL);
 	if (!cfg) {