Don't use enums for DACL/DACR Signal Invert controls,
and change them into a stereo "DAC Signal Invert Switch" control.
Signed-off-by: Vincent Knecht <vincent.knecht@mailoo.org>
Link: https://lore.kernel.org/r/20211222135403.2991657-1-vincent.knecht@mailoo.orgSigned-off-by: Mark Brown <broonie@kernel.org>