sound: Remove endianness checks for format table declarations

This a legacy thing that is not needed anymore. We can support all of
them just fine.

Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Reviewed by: markj
Differential Revision: https://reviews.freebsd.org/D55939

(cherry picked from commit 6755f558c1d7d22cac5b123082fdb2ac080c228d)