ALSA: hda/hdmi: disable KAE for Intel DG2

Use of keep-alive (KAE) has resulted in loss of audio on some A750/770
cards as the transition from keep-alive to stream playback is not
working as expected. As there is limited benefit of the new KAE mode
on discrete cards, revert back to older silent-stream implementation
on these systems.

Cc: stable@vger.kernel.org
Fixes: 15175a4f ("ALSA: hda/hdmi: add keep-alive support for ADL-P and DG2")
Link: https://gitlab.freedesktop.org/drm/intel/-/issues/8307


Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20230413191153.3692049-1-kai.vehmanen@linux.intel.com


Signed-off-by: Takashi Iwai <tiwai@suse.de>