ASoC: Intel: byt/cht: set pm ops dynamically

ASoC: Intel: byt/cht: set pm ops dynamically

The Atom/SST driver does not rely on ASoC power management, but the
SOF driver does. Rather than using a hard-coded build-time assignment,
we can set this pm_ops dynamically depending on what the parent
is. That will remove the last build-time dependency and allow for
coexistence of both SST and SOF drivers for Baytrail/Cherrytrail.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Link: https://lore.kernel.org/r/20201112223825.39765-7-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>