Bug#962134: add Sound Open Firmware

[Matt Corallo]

With the fixes for #976791 landed in linux-5.10~rc7-1~exp1 and the new release of alsa-ucm-conf in testing, this is the 
last remaining issue for getting audio to work on modern Dell machines (in my case a Precision 5750). It would be quite 
a shame for this to sit for a few more months and Debian end up not having working audio on year-old machines come bullseye.

On 8/26/20 12:35 PM, Matt Corallo wrote:
This now impacts more and more devices - new generation Dell laptops that ship with linux need this (plus a new release 
of alsa-ucm-conf with current git) to get audio.