autofs: use wake_up() instead of wake_up_interruptible(()

In autofs_wait_release() wake_up() is used to wake up processes waiting
on a mount callback to complete which matches the wait_event_killable()
in autofs_wait().

But in autofs_catatonic_mode() the wake_up_interruptible() was not also
changed at the time autofs_wait_release() was changed.

Signed-off-by: Ian Kent <raven@themaw.net>
Message-Id: <169112719813.7590.4971499386839952992.stgit@donald.themaw.net>
Signed-off-by: Christian Brauner <brauner@kernel.org>