soc/tegra: pmc: Simplify with scoped for each OF child loop

Use scoped for_each_child_of_node_scoped() when iterating over device
nodes to make code a bit simpler.
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

drivers/soc/tegra/pmc.c

@@ -1438,7 +1438,7 @@ static int tegra_powergate_init(struct tegra_pmc *pmc,
 				struct device_node *parent)
 {
 	struct of_phandle_args child_args, parent_args;
-	struct device_node *np, *child;
+	struct device_node *np;
 	int err = 0;
 
 	/*
@@ -1457,12 +1457,10 @@ static int tegra_powergate_init(struct tegra_pmc *pmc,
 	if (!np)
 		return 0;
 
-	for_each_child_of_node(np, child) {
+	for_each_child_of_node_scoped(np, child) {
 		err = tegra_powergate_add(pmc, child);
-		if (err < 0) {
-			of_node_put(child);
+		if (err < 0)
 			break;
-		}
 
 		if (of_parse_phandle_with_args(child, "power-domains",
 					       "#power-domain-cells",
@@ -1474,10 +1472,8 @@ static int tegra_powergate_init(struct tegra_pmc *pmc,
 
 		err = of_genpd_add_subdomain(&parent_args, &child_args);
 		of_node_put(parent_args.np);
-		if (err) {
-			of_node_put(child);
+		if (err)
 			break;
-		}
 	}
 
 	of_node_put(np);