vxlan:decap caching error (VPP-1462)

Change-Id: I3ef0725684bcb8ea526abe0ce62562b35a0070f5
Signed-off-by: Eyal Bari <ebari@cisco.com>
(cherry picked from commit 0d87894bf2)

src/vnet/vxlan/decap.c

@@ -91,7 +91,7 @@ vxlan4_find_tunnel (vxlan_main_t * vxm, last_tunnel_cache4 * cache,
   };
 
   if (PREDICT_TRUE
-      (key4.key[0] == cache->key[0] || key4.key[1] == cache->key[1]))
+      (key4.key[0] == cache->key[0] && key4.key[1] == cache->key[1]))
     {
       /* cache hit */
       vxlan_decap_info_t di = {.as_u64 = cache->value };