Update temp limits in thermal HAL impl.

Bug: 27549685
Change-Id: I76bbd0987f602bb78a523e0ff584af880ff10510
diff --git a/thermal/thermal.c b/thermal/thermal.c
index f8cb8e9..387942a 100644
--- a/thermal/thermal.c
+++ b/thermal/thermal.c
@@ -93,7 +93,8 @@
         .name = name,
         .current_value = temp * mult,
         .throttling_threshold = throttling_threshold,
-        .shutdown_threshold = shutdown_threshold
+        .shutdown_threshold = shutdown_threshold,
+        .vr_throttling_threshold = UNKNOWN_TEMPERATURE
     };
 
     return 0;