audit: we don't need to __set_current_state(TASK_RUNNING)

audit: we don't need to __set_current_state(TASK_RUNNING)

Remove the calls to __set_current_state() to mark the task as running
and do some related cleanup in wait_for_auditd() to limit the amount
of work we do when we aren't going to reschedule the current task.

Signed-off-by: Paul Moore <paul@paul-moore.com>