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

Change-Id: I56a8f266e6d0afe5ad6737b8d0e399758fb75378
diff --git a/pipelines/fabric/src/main/java/org/onosproject/pipelines/fabric/pipeliner/ForwardingFunctionType.java b/pipelines/fabric/src/main/java/org/onosproject/pipelines/fabric/pipeliner/ForwardingFunctionType.java
index 8d8de54..3cf015d 100644
--- a/pipelines/fabric/src/main/java/org/onosproject/pipelines/fabric/pipeliner/ForwardingFunctionType.java
+++ b/pipelines/fabric/src/main/java/org/onosproject/pipelines/fabric/pipeliner/ForwardingFunctionType.java
@@ -65,11 +65,16 @@
     IPV6_MULTICAST,
 
     /**
-     * MPLS, with EtherType, MPLS label and MPLS BOS criterion.
+     * MPLS, with EtherType, MPLS label and MPLS BOS(true) criterion.
      */
     MPLS,
 
     /**
+     * Pseudo-wire, with EtherType, MPLS label and MPLS BOS(false) criterion.
+     */
+    PW,
+
+    /**
      * Unsupported type.
      */
     UNSUPPORTED;