DRAFT [for alsa-lib 1.2.15]: HDA: Handle better Bass speaker including 4 channel mode

alsa-project/alsa-ucm-conf pull request #533 was edited from perexg:

It's a follow up of #410 .

Request URL : https://github.com/alsa-project/alsa-ucm-conf/pull/533 Patch URL : https://github.com/alsa-project/alsa-ucm-conf/pull/533.patch Repository URL: https://github.com/alsa-project/alsa-ucm-conf