MAINTAINERS: ASoC: Simplify references to Cirrus Logic include files

Change the references to Cirrus Logic files under include/sound to be a
wildcard of all cs* and use X: to exclude the three cs* files that are not
related to ASoC.

This means that new Cirrus Logic files added to include/sound will be
picked up automatically as an ASoC file without any changes to MAINTAINERS.
New files are most likely to be for ASoC drivers now.

It's also easier to manage than ranges of wildcarding for different sets of
files.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://patch.msgid.link/20250423192714.22158-1-rf@opensource.cirrus.com


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