src: use osmo_timer_setup()

Use new function available in libosmocore to set up timers. Compile
tested only.

Change-Id: Ibcfd915688e97d370a888888a83a7c95cbe16819
diff --git a/openbsc/src/libmsc/gsm_04_08.c b/openbsc/src/libmsc/gsm_04_08.c
index 376106f..89108e4 100644
--- a/openbsc/src/libmsc/gsm_04_08.c
+++ b/openbsc/src/libmsc/gsm_04_08.c
@@ -618,8 +618,8 @@
 
 static void schedule_reject(struct gsm_subscriber_connection *conn)
 {
-	conn->loc_operation->updating_timer.cb = loc_upd_rej_cb;
-	conn->loc_operation->updating_timer.data = conn;
+	osmo_timer_setup(&conn->loc_operation->updating_timer, loc_upd_rej_cb,
+			 conn);
 	osmo_timer_schedule(&conn->loc_operation->updating_timer, 5, 0);
 }
 
@@ -2224,8 +2224,7 @@
 				 int sec, int micro)
 {
 	DEBUGP(DCC, "starting timer T%x with %d seconds\n", current, sec);
-	trans->cc.timer.cb = gsm48_cc_timeout;
-	trans->cc.timer.data = trans;
+	osmo_timer_setup(&trans->cc.timer, gsm48_cc_timeout, trans);
 	osmo_timer_schedule(&trans->cc.timer, sec, micro);
 	trans->cc.Tcurrent = current;
 }
@@ -3955,8 +3954,7 @@
 	if (!conn->anch_operation)
 		return -1;
 
-	conn->anch_operation->timeout.data = conn;
-	conn->anch_operation->timeout.cb = anchor_timeout;
+	osmo_timer_setup(&conn->anch_operation->timeout, anchor_timeout, conn);
 	osmo_timer_schedule(&conn->anch_operation->timeout, 5, 0);
 	return 0;
 }