sof-soundwire: cleanups for codecs with multiple functions

alsa-project/alsa-ucm-conf pull request #775 was edited from perexg:

RT712 - move rt712-dmic to rt712 config (included in If.multi_init and from HiFi.conf)

RT713 - move rt713-dmic to rt713 config (included in If.multi_init and from HiFi.conf)

RT713,RT712,RT722 - do not include files for individual devices when multi codec is detected.

Declare 'MultiHeadsetShadow' variable to be consistent with other shadow variables (Speaker, Mic). Use it for RT712 and RT713 (Headphones/Headset devices).

Link: https://github.com/alsa-project/alsa-ucm-conf/issues/774

Request URL   : https://github.com/alsa-project/alsa-ucm-conf/pull/775
Patch URL     : https://github.com/alsa-project/alsa-ucm-conf/pull/775.patch
Repository URL: https://github.com/alsa-project/alsa-ucm-conf