Merge tag 'drm-fixes-2019-05-03' of git://anongit.freedesktop.org/drm/drm

Pull drm fix from Dave Airlie:
 "Just a single qxl revert"

* tag 'drm-fixes-2019-05-03' of git://anongit.freedesktop.org/drm/drm:
  Revert "drm/qxl: drop prime import/export callbacks"