fix warning enumeration values not handled in switch.

This fixes
warning: enumeration values 'POWER_HINT_LOW_POWER', 'POWER_HINT_LAUNCH',
and 'POWER_HINT_DISABLE_TOUCH' not handled in switch [-Wswitch]

Bug: None
Test: The warning is gone.
Change-Id: I175ad1ddc9a40a6e761e85325fcd625a792df8d6
diff --git a/power/power.c b/power/power.c
index 58dcd30..23f826e 100644
--- a/power/power.c
+++ b/power/power.c
@@ -459,6 +459,8 @@
         case POWER_HINT_VIDEO_DECODE:
             process_video_decode_hint(data);
         break;
+	default:
+	break;
     }
 }