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

libhwcomposer/hwc_utils.cpp

@@ -628,6 +628,12 @@ void setMdpFlags(hwc_layer_1_t *layer,
         if(transform & HWC_TRANSFORM_ROT_90) {
             ovutils::setMdpFlags(mdpFlags,
                     ovutils::OV_MDP_SOURCE_ROTATED_90);
+            // enable bandwidth compression only if src width < 2048
+            if(qdutils::MDPVersion::getInstance().supportsBWC() &&
+                hnd->width < qdutils::MAX_DISPLAY_DIM) {
+                ovutils::setMdpFlags(mdpFlags,
+                                 ovutils::OV_MDSS_MDP_BWC_EN);
+            }
         }
     }