ASoC: intel/sdw_utils: move soundwire machine driver helper functions

ASoC: intel/sdw_utils: move soundwire machine driver helper functions

Move below Intel SoundWire machine driver helper functions to
soc_sdw_utils.c file so that it can be used by other platform machine
driver.
- asoc_sdw_is_unique_device()
- asoc_sdw_get_codec_name()

Link: https://github.com/thesofproject/linux/pull/5068
Signed-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/20240801091446.10457-10-Vijendar.Mukunda@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>