PCI: kirin: Use helper function for_each_available_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/dwc/pcie-kirin.c

@@ -452,7 +452,7 @@ static long kirin_pcie_get_resource(struct kirin_pcie *kirin_pcie,
 				    struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
-	struct device_node *child, *node = dev->of_node;
+	struct device_node *node = dev->of_node;
 	void __iomem *apb_base;
 	int ret;
 
@@ -477,17 +477,13 @@ static long kirin_pcie_get_resource(struct kirin_pcie *kirin_pcie,
 		return ret;
 
 	/* Parse OF children */
-	for_each_available_child_of_node(node, child) {
+	for_each_available_child_of_node_scoped(node, child) {
 		ret = kirin_pcie_parse_port(kirin_pcie, pdev, child);
 		if (ret)
-			goto put_node;
+			return ret;
 	}
 
 	return 0;
-
-put_node:
-	of_node_put(child);
-	return ret;
 }
 
 static void kirin_pcie_sideband_dbi_w_mode(struct kirin_pcie *kirin_pcie,