sound: add missing modules to snd_driver
While here, remove unnecessary break.
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Reviewed by: imp, emaste
Differential Revision: https://reviews.freebsd.org/D43394
(cherry picked from commit 3a79c3ac8aa3c548aab9ad38acc4f480ab9e7a5b)