gprs_ns2: always use the same method to print NSVCs

The binds also print a list of associated NSVC when
dumping the bind.
However the binds using their own representation of
printing the NSVC which is different to `show ns entities`.
Use the same function to print NS-VC.

Before:
  NSVCI 00000: udp)[127.0.0.1]:23000<>[127.0.0.1]:22000
After:
  NSVCI none: UNCONFIGURED DYNAMIC data_weight=1 sig_weight=1 udp)[127.0.0.1]:23000<>[127.0.0.1]:22000

Change-Id: If31ec6c1c07dc134ab1ddeb915bc89747c7be048
diff --git a/src/gb/gprs_ns2_udp.c b/src/gb/gprs_ns2_udp.c
index 5765c77..4c986a2 100644
--- a/src/gb/gprs_ns2_udp.c
+++ b/src/gb/gprs_ns2_udp.c
@@ -85,7 +85,7 @@
 }
 
 static void dump_vty(const struct gprs_ns2_vc_bind *bind,
-		     struct vty *vty, bool _stats)
+		     struct vty *vty, bool stats)
 {
 	struct priv_bind *priv;
 	struct gprs_ns2_vc *nsvc;
@@ -109,7 +109,7 @@
 	vty_out(vty, "  %lu NS-VC: %s", nsvcs, VTY_NEWLINE);
 
 	llist_for_each_entry(nsvc, &bind->nsvc, blist) {
-		vty_out(vty, "    NSVCI %05u: %s%s", nsvc->nsvci, gprs_ns2_ll_str(nsvc), VTY_NEWLINE);
+		ns2_vty_dump_nsvc(vty, nsvc, stats);
 	}
 }