Add UCM for RME Fireface UCX

alsa-project/alsa-ucm-conf pull request #606 was opened from vascosantos:

Adds UCM for RME Fireface UCX (heavily based on RME Fireface UCX II config). Device is assumed in CC mode. #605

Request URL : https://github.com/alsa-project/alsa-ucm-conf/pull/606 Patch URL : https://github.com/alsa-project/alsa-ucm-conf/pull/606.patch Repository URL: https://github.com/alsa-project/alsa-ucm-conf