ASoC: SOF: set swidget's core for scheduler widget

Set the swidget's core for scheduler type widgets to match that of the
pipeline core. This simplifies the flow for core get/put during widget
setup/free.

Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20220307181111.49392-4-ranjani.sridharan@linux.intel.com


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