ns2: refactor ns2_prim_status_ind()

Replace parameters nsi + nsei with a single nse pointer.

Change-Id: I35f6381110ba7ba1e013f21120e971362bdff55b
diff --git a/src/gb/gprs_ns2_internal.h b/src/gb/gprs_ns2_internal.h
index 15b0bc5..1980ef8 100644
--- a/src/gb/gprs_ns2_internal.h
+++ b/src/gb/gprs_ns2_internal.h
@@ -213,8 +213,8 @@
 struct msgb *gprs_ns2_msgb_alloc(void);
 
 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_inst *nsi,
-			 uint16_t nsei, uint16_t bvci,
+void ns2_prim_status_ind(struct gprs_ns2_nse *nse,
+			 uint16_t bvci,
 			 enum gprs_ns2_affecting_cause cause);
 void ns2_nse_notify_alive(struct gprs_ns2_vc *nsvc, bool alive);