ceph: wake up the waiters if any new caps comes

When new caps comes we need to wake up the waiters and also when
revoking the caps, there also could be new caps comes.

Link: https://tracker.ceph.com/issues/54044


Signed-off-by: Xiubo Li <xiubli@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>