net-ipvlan: Deletion of an unnecessary check before the function call "free_percpu"

The free_percpu() function tests whether its argument is NULL and then
returns immediately. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Mahesh Bandewar <maheshb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ipvlan/ipvlan_main.c

@@ -125,8 +125,7 @@ static void ipvlan_uninit(struct net_device *dev)
 	struct ipvl_dev *ipvlan = netdev_priv(dev);
 	struct ipvl_port *port = ipvlan->port;
 
-	if (ipvlan->pcpu_stats)
-		free_percpu(ipvlan->pcpu_stats);
+	free_percpu(ipvlan->pcpu_stats);
 
 	port->count -= 1;
 	if (!port->count)