cosmetic: tweak params of hlr_controlif_setup()

Cosmetically prepare for adding new CTRL commands in hlr_controlif_setup():
- drop unused 'gs' param.
- use ctrl_interface_setup_dynip2(), so far with default CTRL nodes; custom
  nodes will be added soon.

Prepares: I98ee6a06b3aa6a67adb868e0b63b0e04eb42eb50
Change-Id: I63004a7953b04988449697dbc5d55d7ed0c6d82d
diff --git a/src/hlr.c b/src/hlr.c
index b32f709..6310526 100644
--- a/src/hlr.c
+++ b/src/hlr.c
@@ -474,7 +474,7 @@
 	}
 
 	g_hlr->ctrl_bind_addr = ctrl_vty_get_bind_addr();
-	g_hlr->ctrl = hlr_controlif_setup(g_hlr, g_hlr->gs);
+	g_hlr->ctrl = hlr_controlif_setup(g_hlr);
 
 	osmo_init_ignore_signals();
 	signal(SIGINT, &signal_hdlr);