ASoC: SOF: ipc4-topology: use common helper function in copier prepare

Use the ipc4_set_fmt_mask() helper function instead of open-coding
the logic in multiple places.

Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20230316141458.13940-3-peter.ujfalusi@linux.intel.com


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