Move rtk SoundWire dmic helper functions implementation to sdw_utils
folder to make it generic.

Link: https://github.com/thesofproject/linux/pull/5068Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://patch.msgid.link/20240801091446.10457-12-Vijendar.Mukunda@amd.comSigned-off-by: Mark Brown <broonie@kernel.org>