Minor bug fix and tidy up for sof_sdw

Merge series from Charles Keepax <ckeepax@opensource.cirrus.com>:

Fix a small bug that can cause the sof_sdw machine driver to fail probe
after the first time it has probed. Also do some minor tidy up on the
handling of the platform_component of the dai links.

diff --cc sound/soc/amd/acp/acp-sdw-legacy-mach.c
Simple merge

diff --cc sound/soc/amd/acp/acp-sdw-sof-mach.c
Simple merge

diff --cc sound/soc/sdw_utils/soc_sdw_utils.c
Simple merge