set vsync power hint

Change-Id: I28c2faf9ff584df3e74392712971cbcf75eb9e98
diff --git a/services/surfaceflinger/EventThread.cpp b/services/surfaceflinger/EventThread.cpp
index 21634ee..47fa2f3 100644
--- a/services/surfaceflinger/EventThread.cpp
+++ b/services/surfaceflinger/EventThread.cpp
@@ -253,13 +253,13 @@
 void EventThread::enableVSyncLocked() {
     if (!mUseSoftwareVSync) {
         // never enable h/w VSYNC when screen is off
-        mHw.getHwComposer().eventControl(HWComposer::EVENT_VSYNC, true);
+        mHw.eventControl(DisplayHardware::EVENT_VSYNC, true);
     }
     mDebugVsyncEnabled = true;
 }
 
 void EventThread::disableVSyncLocked() {
-    mHw.getHwComposer().eventControl(HWComposer::EVENT_VSYNC, false);
+    mHw.eventControl(DisplayHardware::EVENT_VSYNC, false);
     mDebugVsyncEnabled = false;
 }