libhwcomposer: align rotator source buffers for tile format.

for tile format make the rotator source buffers aligned to 64 X 32.
This avoids rotator hang during source fetch.

Change-Id: I9e42788cc6f538b155c073028ce41bf48e1d9349
CRs-fixed: 473297
diff --git a/libhwcomposer/hwc_utils.h b/libhwcomposer/hwc_utils.h
index 50c6a7a..aabb0de 100644
--- a/libhwcomposer/hwc_utils.h
+++ b/libhwcomposer/hwc_utils.h
@@ -205,7 +205,7 @@
         ovutils::eMdpFlags &mdpFlags,
         int rotDownscale, int transform);
 
-int configRotator(overlay::Rotator *rot, const ovutils::Whf& whf,
+int configRotator(overlay::Rotator *rot, ovutils::Whf& whf,
         hwc_rect_t& crop, const ovutils::eMdpFlags& mdpFlags,
         const ovutils::eTransform& orient, const int& downscale);