HWC: Update DisplayFrame of all layers properly in Dynamic FB

Use change in HWC_GEOMETRY_CHANGED flag appropriately to avoid
redundant and unintentional overwrites of DisplayFrame values,
which may result fall back to GPU.

Change-Id: Ifb0f8dc5d356c965b6e80644f32392c460fb1ae7
diff --git a/libhwcomposer/hwc_utils.h b/libhwcomposer/hwc_utils.h
index 6f527aa..0883a51 100644
--- a/libhwcomposer/hwc_utils.h
+++ b/libhwcomposer/hwc_utils.h
@@ -104,8 +104,8 @@
     //If property fbsize set via adb shell debug.hwc.fbsize = XRESxYRES
     //following fields are used.
     bool customFBSize;
-    uint32_t xres_orig;
-    uint32_t yres_orig;
+    uint32_t xres_new;
+    uint32_t yres_new;
 
 };