fix:vxlan mcast adj - added as ucast dpo adj

Change-Id: Ic2447313075cd46f265202dffaaac894f48ddf6d
Signed-off-by: Eyal Bari <ebari@cisco.com>
diff --git a/src/vnet/vxlan/vxlan.c b/src/vnet/vxlan/vxlan.c
index eedc16f..f373a28 100644
--- a/src/vnet/vxlan/vxlan.c
+++ b/src/vnet/vxlan/vxlan.c
@@ -550,7 +550,7 @@
           mcast_shared_t ep = mcast_shared_get(&t->dst);
 
           /* Stack shared mcast dst mac addr rewrite on encap */
-          dpo_set (&dpo, DPO_ADJACENCY,
+          dpo_set (&dpo, DPO_ADJACENCY_MCAST,
                    fib_proto_to_dpo(fp),
                    ep.mcast_adj_index);