mailbox: zynqmp-ipi: Simplify with scoped for each OF child loop

Use scoped for-each loop when iterating over device nodes to make code a
bit simpler.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Jassi Brar <jassisinghbrar@gmail.com>

Author: krzk

drivers/mailbox/zynqmp-ipi-mailbox.c

@@ -904,7 +904,7 @@ static void zynqmp_ipi_free_mboxes(struct zynqmp_ipi_pdata *pdata)
 static int zynqmp_ipi_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
-	struct device_node *nc, *np = pdev->dev.of_node;
+	struct device_node *np = pdev->dev.of_node;
 	struct zynqmp_ipi_pdata *pdata;
 	struct of_phandle_args out_irq;
 	struct zynqmp_ipi_mbox *mbox;
@@ -940,13 +940,12 @@ static int zynqmp_ipi_probe(struct platform_device *pdev)
 	pdata->num_mboxes = num_mboxes;
 
 	mbox = pdata->ipi_mboxes;
-	for_each_available_child_of_node(np, nc) {
+	for_each_available_child_of_node_scoped(np, nc) {
 		mbox->pdata = pdata;
 		mbox->setup_ipi_fn = ipi_fn;
 
 		ret = zynqmp_ipi_mbox_probe(mbox, nc);
 		if (ret) {
-			of_node_put(nc);
 			dev_err(dev, "failed to probe subdev.\n");
 			ret = -EINVAL;
 			goto free_mbox_dev;