sound: Fix mis-sorted CHN_F_BITS line
Fixes: 5317480967bf ("sound: Remove CHN_F_SLEEPING")
Reported by: jhb
Sponsored by: The FreeBSD Foundation
MFC after: 2 days
Reviewed by: jhb, emaste
Differential Revision: https://reviews.freebsd.org/D47781
(cherry picked from commit 29ba0cc4d919243436f1bf73a22a554fa5073a44)