display: Remove default arguments for setMdpFlags function.

Remove default arguments from setMDPflags function to get rid of
issues hidden from the developer.

Change-Id: Ic78645675b0aaab284fe2d0de8fffb4b26beabc7
diff --git a/libhwcomposer/hwc_utils.h b/libhwcomposer/hwc_utils.h
index db5880a..fcee6e7 100644
--- a/libhwcomposer/hwc_utils.h
+++ b/libhwcomposer/hwc_utils.h
@@ -154,7 +154,7 @@
 //Sets appropriate mdp flags for a layer.
 void setMdpFlags(hwc_layer_1_t *layer,
         ovutils::eMdpFlags &mdpFlags,
-        int rotDownscale = 0, int transform = 0);
+        int rotDownscale, int transform);
 
 int configRotator(overlay::Rotator *rot, const ovutils::Whf& whf,
         const hwc_rect_t& crop, const ovutils::eMdpFlags& mdpFlags,