gprs_ns2: add new vty2

Change-Id: I163279cf57e84198dc8c53e1c109f5a9474670e9
diff --git a/src/gb/gprs_ns2_internal.h b/src/gb/gprs_ns2_internal.h
index df3772a..5cb1630 100644
--- a/src/gb/gprs_ns2_internal.h
+++ b/src/gb/gprs_ns2_internal.h
@@ -234,6 +234,7 @@
 
 struct msgb *gprs_ns2_msgb_alloc(void);
 
+void gprs_ns2_sns_write_vty(struct vty *vty, const struct gprs_ns2_nse *nse);
 void gprs_ns2_sns_dump_vty(struct vty *vty, const struct gprs_ns2_nse *nse, bool stats);
 void ns2_prim_status_ind(struct gprs_ns2_nse *nse,
 			 struct gprs_ns2_vc *nsvc,