osmo-ggsn: Transition to use of 'telnet_init_default'

Related: OS#5809
Change-Id: I51b7c175192759e26d1791723540841e72879b02
diff --git a/ggsn/ggsn_main.c b/ggsn/ggsn_main.c
index bc9e0c3..a7c96a7 100644
--- a/ggsn/ggsn_main.c
+++ b/ggsn/ggsn_main.c
@@ -223,7 +223,7 @@
 		exit(2);
 	}
 
-	rc = telnet_init_dynif(tall_ggsn_ctx, NULL, vty_get_bind_addr(), OSMO_VTY_PORT_GGSN);
+	rc = telnet_init_default(tall_ggsn_ctx, NULL, OSMO_VTY_PORT_GGSN);
 	if (rc < 0)
 		exit(1);