cxgb4: Use t4_mgmt_tx() API for sending write l2t request ctrl packets.

Based on original work by Michael Werner <werner@chelsio.com>
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/chelsio/cxgb4/l2t.c

@@ -161,8 +161,7 @@ static int write_l2e(struct adapter *adap, struct l2t_entry *e, int sync)
 		memcpy(e->dmac, e->neigh->ha, sizeof(e->dmac));
 	memcpy(req->dst_mac, e->dmac, sizeof(req->dst_mac));
 
-	set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0);
-	t4_ofld_send(adap, skb);
+	t4_mgmt_tx(adap, skb);
 
 	if (sync && e->state != L2T_STATE_SWITCHING)
 		e->state = L2T_STATE_SYNC_WRITE;