r8169: fix an if condition

There is an extra semi-colon so __rtl8169_set_features() is called every
time.

Fixes: 929a031d ('r8169: adjust __rtl8169_set_features')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Hayes Wang <hayeswang@realtek.com>--
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/realtek/r8169.c

@@ -1818,7 +1818,7 @@ static int rtl8169_set_features(struct net_device *dev,
 	features &= NETIF_F_RXALL | NETIF_F_RXCSUM | NETIF_F_HW_VLAN_CTAG_RX;
 
 	rtl_lock_work(tp);
-	if (features ^ dev->features);
+	if (features ^ dev->features)
 		__rtl8169_set_features(dev, features);
 	rtl_unlock_work(tp);