pinctrl: stm32: Use scope based of_node_put() cleanups

Use scope based of_node_put() cleanup to simplify code.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
Link: https://lore.kernel.org/r/20240504-pinctrl-cleanup-v2-3-26c5f2dc1181@nxp.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/stm32/pinctrl-stm32.c

@@ -670,7 +670,6 @@ static int stm32_pctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
 				 struct device_node *np_config,
 				 struct pinctrl_map **map, unsigned *num_maps)
 {
-	struct device_node *np;
 	unsigned reserved_maps;
 	int ret;
 
@@ -678,12 +677,11 @@ static int stm32_pctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
 	*num_maps = 0;
 	reserved_maps = 0;
 
-	for_each_child_of_node(np_config, np) {
+	for_each_child_of_node_scoped(np_config, np) {
 		ret = stm32_pctrl_dt_subnode_to_map(pctldev, np, map,
 				&reserved_maps, num_maps);
 		if (ret < 0) {
 			pinctrl_utils_free_map(pctldev, *map, *num_maps);
-			of_node_put(np);
 			return ret;
 		}
 	}