Merge remote-tracking branch 'remotes/kraxel/tags/audio-20201215-pull-request' into...

audio: coreaudio playback state fixes.
audio: misc cleanups.

# gpg: Signature made Tue 15 Dec 2020 13:47:57 GMT
# gpg:                using RSA key 4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>" [full]
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>" [full]
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>" [full]
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* remotes/kraxel/tags/audio-20201215-pull-request:
  audio: add sanity check
  audio: Simplify audio_bug() removing old code
  cs4231: Get rid of empty property array
  audio: remove unused function audio_is_cleaning_up()
  coreaudio: always stop audio playback on shut down
  coreaudio: don't start playback in init routine
  coreaudio: rename misnamed variable fake_as

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>