osmo-hnbgw: startup: log the RNC-Id that is going to be used

Change-Id: I8aeb93fe8037e5fdc0784f5fc3bdb527de3b76bd
diff --git a/src/hnbgw.c b/src/hnbgw.c
index ff3e2a9..752fc0f 100644
--- a/src/hnbgw.c
+++ b/src/hnbgw.c
@@ -485,6 +485,8 @@
 		exit(1);
 	}
 
+	LOGP(DHNBAP, LOGL_NOTICE, "Using RNC-Id %u\n", g_hnb_gw->config.rnc_id);
+
 	OSMO_ASSERT(g_hnb_gw->config.iuh_local_ip);
 	LOGP(DMAIN, LOGL_NOTICE, "Listening for Iuh at %s %d\n",
 	     g_hnb_gw->config.iuh_local_ip,