ASoC: amd: acp: Refactor bit width calculation

Refactor bit width calculation using params_physical_width()
instead hard-code values.

Signed-off-by: Venkata Prasad Potturu <venkataprasad.potturu@amd.com>
Link: https://lore.kernel.org/r/20230130100104.4076640-1-venkataprasad.potturu@amd.com


Reviewed-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>