[ONOS-7242] Support MPLS by fabric.p4 pipeliner

Change-Id: I56a8f266e6d0afe5ad6737b8d0e399758fb75378
diff --git a/pipelines/fabric/src/main/resources/include/define.p4 b/pipelines/fabric/src/main/resources/include/define.p4
index 9ba84e9..1db958f 100644
--- a/pipelines/fabric/src/main/resources/include/define.p4
+++ b/pipelines/fabric/src/main/resources/include/define.p4
@@ -20,7 +20,7 @@
 #define MAX_PORTS 511
 
 typedef bit<3>  fwd_type_t;
-typedef bit<32>  next_id_t;
+typedef bit<32> next_id_t;
 typedef bit<3>  next_type_t;
 typedef bit<20> mpls_label_t;
 typedef bit<9>  port_num_t;
@@ -60,4 +60,6 @@
 const next_type_t NEXT_TYPE_BROADCAST = 2;
 const next_type_t NEXT_TYPE_PUNT = 3;
 
+const bit<8> DEFAULT_MPLS_TTL = 64;
+
 #endif