Roland Bridgecast - add missing intermediate config file

[GitHub pull_request - opened <github@xxxxxxxxxxxxxxxx>]

alsa-project/alsa-ucm-conf pull request #354 was opened from smangels:

- closes #353
- tested on ArchLinux running UCM version 1.2.10

Request URL   : https://github.com/alsa-project/alsa-ucm-conf/pull/354
Patch URL     : https://github.com/alsa-project/alsa-ucm-conf/pull/354.patch
Repository URL: https://github.com/alsa-project/alsa-ucm-conf