rockchip平台关闭硬件加速 vendor.hwc.compose_policy

//force go into GPU
  int iMode = hwc_get_int_property("vendor.hwc.compose_policy","0");

  if((iMode!=1 || gles_policy) && iMode != 2){
    ctx.state.setHwcPolicy.insert(HWC_GLES_POLICY);
    ALOGD_IF(LogLevel(DBG_DEBUG),"Force use GLES compose, iMode=%d, gles_policy=%d, soc_id=%x",iMode,gles_policy,ctx.state.iSocId);
    return 0;
  }

  ALOGD_IF(LogLevel(DBG_DEBUG),"request:afbcd=%d,scale=%d,yuv=%d,rotate=%d,hdr=%d,skip=%d\n"
          "support:afbcd=%d,scale=%d,yuv=%d,rotate=%d,hdr=%d, %s,line=%d,",
          ctx.request.iAfbcdCnt,ctx.request.iScaleCnt,ctx.request.iYuvCnt,
          ctx.request.iRotateCnt,ctx.request.iHdrCnt,ctx.request.iSkipCnt,
          ctx.support.iAfbcdCnt,ctx.support.iScaleCnt,ctx.support.iYuvCnt,
          ctx.support.iRotateCnt,ctx.support.iHdrCnt,
          __FUNCTION__,__LINE__);

  // Match policy first
  if(!TryOverlay())
    TryMix();

  return 0;
}