cxgb4: use __vlan_hwaccel helpers

Use __vlan_hwaccel_put_tag() to set vlan tag and proto fields.
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/infiniband/hw/cxgb4/cm.c

@@ -3944,7 +3944,7 @@ static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb)
 	} else {
 		vlan_eh = (struct vlan_ethhdr *)(req + 1);
 		iph = (struct iphdr *)(vlan_eh + 1);
-		skb->vlan_tci = ntohs(cpl->vlan);
+		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), ntohs(cpl->vlan));
 	}
 
 	if (iph->version != 0x4)