net: ethernet: remove redundant null pointer check before of_node_put

of_node_put has taken the null pointer check into account. So it is
safe to remove the duplicated check before of_node_put.
Signed-off-by: zhong jiang <zhongjiang@huawei.com>
Reviewed-by: Vladimir Zapolskiy <vz@mleia.com>
Acked-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/freescale/fec_main.c

@@ -2054,7 +2054,6 @@ static int fec_enet_mii_init(struct platform_device *pdev)
 
 	node = of_get_child_by_name(pdev->dev.of_node, "mdio");
 	err = of_mdiobus_register(fep->mii_bus, node);
-	if (node)
 	of_node_put(node);
 	if (err)
 		goto err_out_free_mdiobus;