hwc: Compute external display position for UI layers.

Do external display position calculation for UI layers.

Change-Id: I55c36f3d44ae59b506d6d2ebff791d22f2529b6e
diff --git a/libhwcomposer/hwc_utils.cpp b/libhwcomposer/hwc_utils.cpp
index a36a944..2a46380 100644
--- a/libhwcomposer/hwc_utils.cpp
+++ b/libhwcomposer/hwc_utils.cpp
@@ -1461,10 +1461,7 @@
             whf.format = getMdpFormat(HAL_PIXEL_FORMAT_BGRX_8888);
     }
 
-    if(dpy && isYuvBuffer(hnd)) {
-        calcExtDisplayPosition(ctx, hnd, dpy, crop, dst,
-                                           transform, orient);
-    }
+    calcExtDisplayPosition(ctx, hnd, dpy, crop, dst, transform, orient);
 
     if(isYuvBuffer(hnd) && ctx->mMDP.version >= qdutils::MDP_V4_2 &&
        ctx->mMDP.version < qdutils::MDSS_V5) {