Revert "Change SurfaceControl setPosition to take floats"

Temporary, to fix weekend build, until we get Nvidia code drop.

This reverts commit 9a867a8798fa6ea21f6341db31e38ea64fde6c83

DO NOT MERGE

Change-Id: I7b5dbc4db46ef3d97dc8598057d5487d6971178b
diff --git a/include/gui/SurfaceControl.h b/include/gui/SurfaceControl.h
index 9268e7d..f70888d 100644
--- a/include/gui/SurfaceControl.h
+++ b/include/gui/SurfaceControl.h
@@ -57,7 +57,7 @@
     
     status_t    setLayerStack(int32_t layerStack);
     status_t    setLayer(int32_t layer);
-    status_t    setPosition(float x, float y);
+    status_t    setPosition(int32_t x, int32_t y);
     status_t    setSize(uint32_t w, uint32_t h);
     status_t    hide();
     status_t    show();