sof-soundwire: cs42l43: Switch mixer based on output volume

sof-soundwire: cs42l43: Switch mixer based on output volume

Hardware volume control in cs42l43 can go up to +31.5dB which can
cause audio degradation. For best results, limit hardware volume to 0dB.

The application may request >0dB mixer volume controls using
'@OutMix>0dB' variable passed to snd_use_case_mgr_open().

Closes: https://github.com/alsa-project/alsa-ucm-conf/pull/540
Link: https://gitlab.freedesktop.org/pipewire/pipewire/-/issues/4622
Signed-off-by: Maciej Strozek <mstrozek@opensource.cirrus.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>