* commit '763d69bf':
  Add some more deprecation guards

- psnr() deprecation is not merged within ffmpeg.c as we still use it in
  non-deprecated code

- the XVMC chunk is not merged as we still apparently maintain it

- The guarding in lavc/qtrleenc.c could be simplified but merged anyway.
Merged-by: Clément Bœsch <clement@stupeflix.com>