ASoC: SOF: Intel: hda-dai: use component_get_drvdata to find hdac_bus

Remove the last usage of substream->runtime->private_data in the
HDAudio BE hw_params.

The SOF core saves the 'sdev' global context as component drvdata, and
we already save the bus information in sdev.

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/20221024165310.246183-8-pierre-louis.bossart@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>