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/osmo-bsc/osmo_bsc_msc.c b/openbsc/src/osmo-bsc/osmo_bsc_msc.c
index 42e8055..8d02624 100644
--- a/openbsc/src/osmo-bsc/osmo_bsc_msc.c
+++ b/openbsc/src/osmo-bsc/osmo_bsc_msc.c
@@ -526,10 +526,8 @@
 		return -1;
 	}
 
-	data->ping_timer.cb = msc_ping_timeout_cb;
-	data->ping_timer.data = data;
-	data->pong_timer.cb = msc_pong_timeout_cb;
-	data->pong_timer.data = data;
+	osmo_timer_setup(&data->ping_timer, msc_ping_timeout_cb, data);
+	osmo_timer_setup(&data->pong_timer, msc_pong_timeout_cb, data);
 
 	data->msc_con->write_queue.bfd.data = data;
 	data->msc_con->connection_loss = msc_connection_was_lost;