PCI: apple: Use helper function for_each_child_of_node_scoped()

The for_each_available_child_of_node_scoped() helper provides
a scope-based clean-up functionality to put the device_node
automatically, and as such, there is no need to call of_node_put()
directly.

Thus, use this helper to simplify the code.

Signed-off-by: Zhang Zekun <[email protected]>
Reviewed-by: Jonathan Cameron <[email protected]>
Reviewed-by: Manivannan Sadhasivam <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <[email protected]>

Author: Zhang Zekun

drivers/pci/controller/pcie-apple.c

@@ -732,7 +732,6 @@ static int apple_pcie_init(struct pci_config_window *cfg)
 {
 	struct device *dev = cfg->parent;
 	struct platform_device *platform = to_platform_device(dev);
-	struct device_node *of_port;
 	struct apple_pcie *pcie;
 	int ret;
 
@@ -755,11 +754,10 @@ static int apple_pcie_init(struct pci_config_window *cfg)
 	if (ret)
 		return ret;
 
-	for_each_child_of_node(dev->of_node, of_port) {
+	for_each_child_of_node_scoped(dev->of_node, of_port) {
 		ret = apple_pcie_setup_port(pcie, of_port);
 		if (ret) {
 			dev_err(pcie->dev, "Port %pOF setup fail: %d\n", of_port, ret);
-			of_node_put(of_port);
 			return ret;
 		}
 	}