ceph: wake up mount thread when getting osdmap

Now that the mount thread waits for the osdmap, it needs
to be awaken.
Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>

fs/ceph/osd_client.c

@@ -1078,6 +1078,7 @@ void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
 	if (newmap)
 		kick_requests(osdc, NULL);
 	up_read(&osdc->map_sem);
+	wake_up(&osdc->client->auth_wq);
 	return;
 
 bad: