VOL-4640: Changes to DMI interface to support Combo PON functionality

Change-Id: Ia80843d350e07ad6afe6b42a9da105f3be82706b
diff --git a/protos/dmi/hw_management_service.proto b/protos/dmi/hw_management_service.proto
index 7b24925..e98a0be 100644
--- a/protos/dmi/hw_management_service.proto
+++ b/protos/dmi/hw_management_service.proto
@@ -64,6 +64,7 @@
         INVALID_PARAMS = 3;

         INTERNAL_ERROR = 4;

         DEVICE_UNREACHABLE = 5;

+        SET_UNSUPPORTED = 6;

     }

     Status status = 1;

     Reason reason = 2;