[PATCH] Add missing tvaudio try_to_freeze()

Tvaudio lacks a refrigerator call. This patch fixes that.

Signed-off-by: Nigel Cunningham <ncunningham@suspend2.net>
Cc: <video4linux-list@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>