There are not any existing users of the interface (and it would always return -ENOSYS to the caller anyway). Signed-off-by: Shaun Ruffell <sruffell@digium.com> git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9246 a0bf4364-ded3-4de4-8d8a-66a801d63aff