ASoC: SDCA: Remove outdated todo comment

ASoC: SDCA: Remove outdated todo comment

Support for -cn- properties has already been added, however the TODO
comment noting this feature was required was not removed. Remove the
now redundant comment.

Fixes: 50a479527ef01 ("ASoC: SDCA: Add support for -cn- value properties")
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://patch.msgid.link/20260204125944.1134011-2-ckeepax@opensource.cirrus.com
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.dev>
Signed-off-by: Mark Brown <broonie@kernel.org>