Lenovo m920sff support (Realtek ALC 233)

[GitHub issues - opened]

alsa-project/alsa-ucm-conf issue #114 was opened from perexg:

More info: https://github.com/thesofproject/linux/issues/3088

```
Simple mixer control 'Master',0
Simple mixer control 'Headphone',0
Simple mixer control 'Headphone+LO',0
Simple mixer control 'Speaker',0
Simple mixer control 'Front Mic',0
Simple mixer control 'Front Mic Boost',0
Simple mixer control 'Line Out',0
Simple mixer control 'Mic',0
Simple mixer control 'Mic Boost',0
Simple mixer control 'IEC958',0
Simple mixer control 'IEC958',1
Simple mixer control 'IEC958',2
Simple mixer control 'Capture',0
Simple mixer control 'Auto-Mute Mode',0
Simple mixer control 'Dmic0',0
Simple mixer control 'Dmic1 2nd',0
Simple mixer control 'Loopback Mixing',0
Simple mixer control 'PGA1.0 1 Master',0
Simple mixer control 'PGA2.0 2 Master',0
Simple mixer control 'PGA3.0 3 Master',0
Simple mixer control 'PGA4.0 4 Master',0
Simple mixer control 'PGA7.0 7 Master',0
Simple mixer control 'PGA8.0 8 Master',0
Simple mixer control 'PGA9.0 9 Master',0
```

Issue URL     : https://github.com/alsa-project/alsa-ucm-conf/issues/114
Repository URL: https://github.com/alsa-project/alsa-ucm-conf