Add transpose support for qsv_vpp with rotate and hflip:
    - rotate: [0, 3] support clockwise rotation of 0, 90, 180, 270;
    - hflip:  [0, 1] support horizontal flip;

Configure with:
{"cclock_hflip","clock","cclock","clock_hflip","reversal","hflip","vflip"}

CMD:
ffmpeg -hwaccel qsv -c:v h264_qsv -i input.h264
    -vf 'format=qsv,vpp_qsv=transpose=clock' -c:v h264_qsv output.h264

ffmpeg -init_hw_device qsv=hw -filter_hw_device hw -c:v h264_qsv -i input.h264
    -vf 'hwupload=extra_hw_frames=64,format=qsv,vpp_qsv=transpose=cclock_hflip'
                            -f rawvideo -pix_fmt nv12 ./transpose.yuv
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
Signed-off-by: Zhong Li <zhong.li@intel.com>