net dsa: qca8k: fix usages of device_get_named_child_node()

The documentation for device_get_named_child_node() mentions this
important point:

"
The caller is responsible for calling fwnode_handle_put() on the
returned fwnode pointer.
"

Add fwnode_handle_put() to avoid leaked references.

Fixes: 1e264f9d ("net: dsa: qca8k: add LEDs basic support")
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/qca/qca8k-leds.c

@@ -431,8 +431,11 @@ qca8k_parse_port_leds(struct qca8k_priv *priv, struct fwnode_handle *port, int p
 		init_data.devicename = kasprintf(GFP_KERNEL, "%s:0%d",
 						 priv->internal_mdio_bus->id,
 						 port_num);
-		if (!init_data.devicename)
+		if (!init_data.devicename) {
+			fwnode_handle_put(led);
+			fwnode_handle_put(leds);
 			return -ENOMEM;
+		}
 
 		ret = devm_led_classdev_register_ext(priv->dev, &port_led->cdev, &init_data);
 		if (ret)
@@ -441,6 +444,7 @@ qca8k_parse_port_leds(struct qca8k_priv *priv, struct fwnode_handle *port, int p
 		kfree(init_data.devicename);
 	}
 
+	fwnode_handle_put(leds);
 	return 0;
 }
 
@@ -471,9 +475,13 @@ qca8k_setup_led_ctrl(struct qca8k_priv *priv)
 		 * the correct port for LED setup.
 		 */
 		ret = qca8k_parse_port_leds(priv, port, qca8k_port_to_phy(port_num));
-		if (ret)
+		if (ret) {
+			fwnode_handle_put(port);
+			fwnode_handle_put(ports);
 			return ret;
+		}
 	}
 
+	fwnode_handle_put(ports);
 	return 0;
 }