frame_relay; Fix Q.933 async STATUS at DLC creation

Fix the encoding of the asynchronous Q.933 STATUS message
we send at DLC creation time.

Change-Id: Id1460ffa6266be85f44579c447421eed12481b02
Closes: OS#5010
diff --git a/src/gb/frame_relay.c b/src/gb/frame_relay.c
index 7c75cd0..c54384e 100644
--- a/src/gb/frame_relay.c
+++ b/src/gb/frame_relay.c
@@ -977,7 +977,7 @@
 	llist_add_tail(&dlc->list, &link->dlc_list);
 
 	dlc->add = true;
-	tx_lmi_q933_status(link, Q933_IEI_PVC_STATUS);
+	tx_lmi_q933_status(link, Q933_REPT_SINGLE_PVC_ASYNC_STS);
 
 	return dlc;
 }