net: openvswitch: Remove redundant if statements

The 'if (dev)' statement already move into dev_{put , hold}, so remove
redundant if statements.
Signed-off-by: Xu Wang <vulab@iscas.ac.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/openvswitch/vport-netdev.c

@@ -137,8 +137,7 @@ static void vport_netdev_free(struct rcu_head *rcu)
 {
 	struct vport *vport = container_of(rcu, struct vport, rcu);
 
-	if (vport->dev)
-		dev_put(vport->dev);
+	dev_put(vport->dev);
 	ovs_vport_free(vport);
 }