sound: use device_set_descf() to set device descriptions

[christos]

Summary

Commit 6b6914c1e21b introduced a printf-like version of
device_set_desc(), so use it to simplify device description setting in
the audio stack.

Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks

Test Plan

The whole audio stack builds fine.

[christos]

@dev_submerge.ch This patch modifies part of your latest HDSPe commit. Since I do not have an HDSPe card to test, can you make sure this works fine?

[markj]

Nice cleanup.

[dev_submerge.ch]

Looks good to me, /dev/sndstat output is

pcm3: <HDSPe RayDAT [aes]> (play/rec)
pcm4: <HDSPe RayDAT [s/pdif]> (play/rec)
pcm5: <HDSPe RayDAT [adat1]> (play/rec)
pcm6: <HDSPe RayDAT [adat2]> (play/rec)
pcm7: <HDSPe RayDAT [adat3]> (play/rec)
pcm8: <HDSPe RayDAT [adat4]> (play/rec)

as expected.

[dev_submerge.ch]

Please note that this commit depends on rGd7fde2c9eccf, and thus also on rGb6052c10fb4ad. These were not marked for MFC. Don't know much about MFC procedures, but cherry-picking this commit without the others will probably fail. Feel free to MFC them as well if needed.

[christos]

In D43467#991014, @dev_submerge.ch wrote:

Please note that this commit depends on rGd7fde2c9eccf, and thus also on rGb6052c10fb4ad. These were not marked for MFC. Don't know much about MFC procedures, but cherry-picking this commit without the others will probably fail. Feel free to MFC them as well if needed.

Thank you.