Miss mapping to unmute the middle speakers for Creative X-Fi with 20K1 chipset cards in analog-output.conf

[GitHub issues - edited]

alsa-project/alsa-utils issue #54 was edited from deathxxx123:

Hi there. I want to report some bug, that is present from long time and i think that can be fixed now.
With any configuration that uses center/subwoofer, that center gets muted by default for Creative X-Fi with 20K1 chipset cards, but if you have other card, that will not happen, because of missing configuration in `analog-output.conf`.
The missing thing in `analog-output.conf` is:
```
[Element Center/LFE]
switch = mute
volume = merge
override-map.1 = center,lfe
```
You can see my issue and fix there:
https://github.com/gamer-os/gamer-os/issues/131

Issue URL     : https://github.com/alsa-project/alsa-utils/issues/54
Repository URL: https://github.com/alsa-project/alsa-utils