phy: qualcomm: phy-qcom-qmp: Add of_node_put() before return

Each iteration of for_each_available_child_of_node() puts the previous
node, but in the case of a return from the middle of the loop, there is
no put, thus causing a memory leak. Hence create a new label,
err_node_put, that puts the previous node (child) before returning the
required value. Also include the statement pm_runtime_disable() under
this label in order to avoid repetition among mid-loop return
conditions. Edit the mid-loop return statements to instead go to this
new label err_node_put.
Issue found with Coccinelle.
Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

drivers/phy/qualcomm/phy-qcom-qmp.c

@@ -2093,8 +2093,7 @@ static int qcom_qmp_phy_probe(struct platform_device *pdev)
 		if (ret) {
 			dev_err(dev, "failed to create lane%d phy, %d\n",
 				id, ret);
-			pm_runtime_disable(dev);
-			return ret;
+			goto err_node_put;
 		}
 
 		/*
@@ -2105,8 +2104,7 @@ static int qcom_qmp_phy_probe(struct platform_device *pdev)
 		if (ret) {
 			dev_err(qmp->dev,
 				"failed to register pipe clock source\n");
-			pm_runtime_disable(dev);
-			return ret;
+			goto err_node_put;
 		}
 		id++;
 	}
@@ -2118,6 +2116,11 @@ static int qcom_qmp_phy_probe(struct platform_device *pdev)
 		pm_runtime_disable(dev);
 
 	return PTR_ERR_OR_ZERO(phy_provider);
+
+err_node_put:
+	pm_runtime_disable(dev);
+	of_node_put(child);
+	return ret;
 }
 
 static struct platform_driver qcom_qmp_phy_driver = {