liboverlay: Add support for MDSS Bandwidth Compression

- This adds support for Bandwidth Compression.
- If MDSS supports BWC, then we set BWC flags
  to both Rotator(encode) and overlay(decode)

Change-Id: I6f7800716a2ce2ab855f4c0b1a53cd96f7d06d74
diff --git a/liboverlay/overlayUtils.h b/liboverlay/overlayUtils.h
index ceb238d..0893328 100644
--- a/liboverlay/overlayUtils.h
+++ b/liboverlay/overlayUtils.h
@@ -262,6 +262,7 @@
     OV_MDP_FLIP_V = MDP_FLIP_UD,
     OV_MDSS_MDP_RIGHT_MIXER = MDSS_MDP_RIGHT_MIXER,
     OV_MDP_PP_EN = MDP_OVERLAY_PP_CFG_EN,
+    OV_MDSS_MDP_BWC_EN = MDP_BWC_EN,
 };
 
 enum eZorder {