Add support for Lenovo ThinkStation P620 Main Audio

[GitHub pull_request - opened]

alsa-project/alsa-ucm-conf pull request #42 was opened from khfeng:

This add support for internal speaker and front headset.

We need two separate configs to let PulseAudio understands they are two
different profiles, so the headset's port availability won't affect
speaker's profile availability.

Request URL   : https://github.com/alsa-project/alsa-ucm-conf/pull/42
Patch URL     : https://github.com/alsa-project/alsa-ucm-conf/pull/42.patch
Repository URL: https://github.com/alsa-project/alsa-ucm-conf