Merge branch 'drm-fixes-4.8' of git://people.freedesktop.org/~agd5f/linux into drm-fixes

two amd fixes.

* 'drm-fixes-4.8' of git://people.freedesktop.org/~agd5f/linux:
  drm/radeon/si/dpm: add workaround for for Jet parts
  drm/amdgpu: disable CRTCs before teardown