ASoC: SOF: Intel: hda-dai: Do snd_hdac_ext_stream_decouple() only once

Call snd_hdac_ext_stream_decouple_locked() unconditionally in
hda_link_stream_assign(), the snd_hdac_ext_stream_decouple_locked() have
internal checks to avoid re-configuring.

There is no need to call snd_hdac_ext_stream_decouple() via
hda_link_dma_params() as the stream must have been set to decoupled when
it got assigned (even if it used local condition to call
snd_hdac_ext_stream_decouple_locked()).

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://lore.kernel.org/r/20220712131620.13365-3-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>