UPSTREAM: ASoC: SOF: hda-stream: only enable DPIB if needed

The existing code is inconsistent, we should only enable DPIB if the
'use_posbuf' field is true.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20211207193947.71080-5-pierre-louis.bossart@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>
(cherry picked from commit ae81d8fd)

BUG=b:218766331
TEST=Test sound cards are listed and audio playback works.

Signed-off-by: Terry Cheong <htcheong@chromium.org>
Signed-off-by: Madhulika Dolke <madhulika.dolke@intel.com>
(cherry picked from commit ae81d8fd)
Change-Id: I0bfa2cdc65971d7cee16c66b95f28e0abd78d236