net: dsa: mt7530: add missing of_node_put() in mt7530_setup()

commit a9e9b091a1 upstream.

Add of_node_put() if of_get_phy_mode() fails in mt7530_setup()

Fixes: 0c65b2b90d ("net: of_get_phy_mode: Change API to solve int/unit warnings")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20220428095317.538829-1-yangyingliang@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/net/dsa/mt7530.c

@@ -2216,6 +2216,7 @@ mt7530_setup(struct dsa_switch *ds)
 				ret = of_get_phy_mode(mac_np, &interface);
 				if (ret && ret != -ENODEV) {
 					of_node_put(mac_np);
+					of_node_put(phy_node);
 					return ret;
 				}
 				id = of_mdio_parse_addr(ds->dev, phy_node);