RFC: massive snd_hda driver update to better conform UAA

[Alexander Motin]

Andriy Gapon wrote:
> A note unrelated to the previous report.
> On my 6.3/amd64 system I get a message similar to the following each
> time I kldunload snd_hda:
> 
> kernel: hdac0: detached
> kernel: Warning: memory type hdac leaked memory on destroy (7
> allocations, 16832 bytes leaked).
> 
> Also several cycles of snd_hda unload/load lead to a complete freeze of
> the system.

I know about this and I am working on it. I expect it will be fixed soon 
in next patch version together with set of other improvements.

-- 
Alexander Motin