[VOL-4666] Introduce enum value for GPON XGSPON Combo Transceivers

Change-Id: I029660357515ee462d76c2a2161268c191e74bb5
diff --git a/cpp/dmi/hw.pb.h b/cpp/dmi/hw.pb.h
index a28a8bb..83fd143 100644
--- a/cpp/dmi/hw.pb.h
+++ b/cpp/dmi/hw.pb.h
@@ -518,6 +518,7 @@
   CPON = 5,
   NG_PON2 = 6,
   EPON = 7,
+  COMBO_GPON_XGSPON = 8,
   TYPE_NOT_DETECTED = 255,
   TransceiverType_INT_MIN_SENTINEL_DO_NOT_USE_ = std::numeric_limits<::google::protobuf::int32>::min(),
   TransceiverType_INT_MAX_SENTINEL_DO_NOT_USE_ = std::numeric_limits<::google::protobuf::int32>::max()