dsp: lsm: move lsm_common deregister out of mutex_lock

When dispatch_event in apr and q6lsm_client_free in q6lsm
are running concurrently, there may be deadlock between
session_lock in lsm and svc->m_lock in apr for lsm_common.
Move lsm_common mmap apr deregister out of mutex_lock to
avoid deadlock.

Change-Id: I7c96ba12834bd4a7c8e5ca1b78d798578678b251
Signed-off-by: Meng Wang <mengw@codeaurora.org>

dsp/q6lsm.c

@@ -376,10 +376,10 @@ void q6lsm_client_free(struct lsm_client *client)
 		return;
 	}
 	apr_deregister(client->apr);
+	q6lsm_mmap_apr_dereg();
 	client->mmap_apr = NULL;
 	mutex_lock(&session_lock);
 	q6lsm_session_free(client);
-	q6lsm_mmap_apr_dereg();
 	mutex_destroy(&client->cmd_lock);
 	kfree(client);
 	client = NULL;