lp: add NonDiscovery field and tag

refs #4355

Change-Id: Ib3a64589d7ea3bbf204e295a75d91748ef9c85b9
diff --git a/src/lp/tlv.hpp b/src/lp/tlv.hpp
index 5ab1a92..fb24ab3 100644
--- a/src/lp/tlv.hpp
+++ b/src/lp/tlv.hpp
@@ -38,12 +38,13 @@
   Nack = 800,
   NackReason = 801,
   NextHopFaceId = 816,
+  IncomingFaceId = 817,
   CachePolicy = 820,
   CachePolicyType = 821,
-  IncomingFaceId = 817,
   CongestionMark = 832,
   Ack = 836,
-  TxSequence = 840
+  TxSequence = 840,
+  NonDiscovery = 844,
 };
 
 enum {