igbvf: Fix trunk vlan

Changes to clean up the VLAN Rx path by Jiri Pirko broke trunk VLAN.
Trunk VLANs in a VF driver are those set using

"ip link set <pfdev> vf <n> <vlanid>"
Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
CC: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/igbvf/netdev.c

@@ -102,8 +102,8 @@ static void igbvf_receive_skb(struct igbvf_adapter *adapter,
 {
 	if (status & E1000_RXD_STAT_VP) {
 		u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
-
-		__vlan_hwaccel_put_tag(skb, vid);
+		if (test_bit(vid, adapter->active_vlans))
+			__vlan_hwaccel_put_tag(skb, vid);
 	}
 	netif_receive_skb(skb);
 }