[ipa] Fix the reporting of link down...

Now bsc_init.c is able to handle the link down messages.
diff --git a/openbsc/src/input/ipaccess.c b/openbsc/src/input/ipaccess.c
index 8fb9d3a..8a8a198 100644
--- a/openbsc/src/input/ipaccess.c
+++ b/openbsc/src/input/ipaccess.c
@@ -350,7 +350,7 @@
 	/* send OML down */
 	ts = bts->oml_link->ts;
 	line = ts->line;
-	e1inp_event(ts, EVT_E1_TEI_DN, 0, IPAC_PROTO_OML);
+	e1inp_event(ts, EVT_E1_TEI_DN, bts->oml_link->tei, bts->oml_link->sapi);
 
 	bfd = &ts->driver.ipaccess.fd;
 	bsc_unregister_fd(bfd);
@@ -419,7 +419,7 @@
 
 	/* send RSL down */
 	ts = trx->rsl_link->ts;
-	e1inp_event(ts, EVT_E1_TEI_DN, 0, IPAC_PROTO_RSL);
+	e1inp_event(ts, EVT_E1_TEI_DN, trx->rsl_link->tei, trx->rsl_link->sapi);
 
 	/* close the socket */
 	bfd = &ts->driver.ipaccess.fd;