ns2: Add a rate_ctr for each NS-UNBLOCK

We have one for BLOCK, so let's also add one for UNBLOCK.

Change-Id: I693109b7bc4d72b6803b40aae15327389aa37c69
diff --git a/src/gb/gprs_ns2_vc_fsm.c b/src/gb/gprs_ns2_vc_fsm.c
index e69f327..839bf6f 100644
--- a/src/gb/gprs_ns2_vc_fsm.c
+++ b/src/gb/gprs_ns2_vc_fsm.c
@@ -373,6 +373,9 @@
 	struct gprs_ns2_vc *nsvc = priv->nsvc;
 	struct gprs_ns2_nse *nse = nsvc->nse;
 
+	if (old_state != GPRS_NS2_ST_UNBLOCKED)
+		rate_ctr_inc(&nsvc->ctrg->ctr[NS_CTR_UNBLOCKED]);
+
 	priv->accept_unitdata = true;
 	ns2_nse_notify_unblocked(nsvc, true);
 	ns2_prim_status_ind(nse, nsvc, 0, GPRS_NS2_AFF_CAUSE_VC_RECOVERY);