Fix muted output and low ouput/input volume on a Dell Latitude 3410

[GitHub pull_request - opened]

alsa-project/alsa-ucm-conf pull request #56 was opened from J-Bu:

Using following environment on a Dell Latitude 3410 results in muted master channel and low output/input volume:

 - alsa-libs 1.2.4
 - alsa-ucm-conf 1.2.4
 - alsa-topology-conf 1.2.4
 - alsa-utils 1.2.4
 - kernel 5.9.1 -> with commit 3dca35e applied on top of it 
 - sof-bin v1.6

The propused changes fixes the problem for me. I don't know why but the given values are not 1:1 mapped to levels in alsamixer, please see attached iamges for alsamixer levels before and after the change, the alsamixer levels where captured after running "alsactl init":

before:
![before](https://user-images.githubusercontent.com/15876551/96853514-bf0f5f80-145a-11eb-9c7f-751834a56491.png)

after:
![after](https://user-images.githubusercontent.com/15876551/96853530-c46caa00-145a-11eb-9057-5399382d195d.png)

Request URL   : https://github.com/alsa-project/alsa-ucm-conf/pull/56
Patch URL     : https://github.com/alsa-project/alsa-ucm-conf/pull/56.patch
Repository URL: https://github.com/alsa-project/alsa-ucm-conf