ASOC: SOF: Intel: use snd_soc_dai_get_widget()

We have a helper, use it to simplify widget lookup

Suggested-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20211224021034.26635-2-yung-chuan.liao@linux.intel.com


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