sound: Move vchan-related code to pcm/vchan.*

[christos]

Summary

pcm/sound.* contains code that should be part of pcm/vchan.*.

Changes:

• pcm_setvchans() -> vchan_setnew()
• pcm_setmaxautovchans() -> vchan_setmaxauto()
• hw.snd.maxautovchans moved to pcm/vchan.c
• snd_maxautovchans declaration moved to pcm/vchan.h and definition to pcm/vchan.c

Sponsored by: The FreeBSD Foundation
MFC after: 1 week

[dev_submerge.ch]

What is this diff based on? I can't apply it on any branch I have.

[christos]

In D45015#1026743, @dev_submerge.ch wrote:

What is this diff based on? I can't apply it on any branch I have.

I forgot to stack the patches, but it is diffed against the previous ones. I thought it wasn't needed, but I can diff against main and reupload if you want.

[dev_submerge.ch]

In D45015#1026744, @christos wrote:

In D45015#1026743, @dev_submerge.ch wrote:

What is this diff based on? I can't apply it on any branch I have.

I forgot to stack the patches, but it is diffed against the previous ones. I thought it wasn't needed, but I can diff against main and reupload if you want.

I suppose it's fine, there's no functional changes and it compiles for you and Mark. I'm not a reviewer for all of your patches so I'll naturally miss some.