GPRS: unify NS state printing

* introduce defines with NS state names
* use them for vty and tests
* expand test output to print complete NS state

Change-Id: I69f8d536135ae76dbca623c2f1ffba625adcb1e9
Related: SYS#3610
diff --git a/tests/gb/gprs_ns_test.c b/tests/gb/gprs_ns_test.c
index 456d8e3..0bbf943 100644
--- a/tests/gb/gprs_ns_test.c
+++ b/tests/gb/gprs_ns_test.c
@@ -390,11 +390,12 @@
 	printf("Current NS-VCIs:\n");
 	llist_for_each_entry(nsvc, &nsi->gprs_nsvcs, list) {
 		struct sockaddr_in *peer = &(nsvc->ip.bts_addr);
-		printf("    VCI 0x%04x, NSEI 0x%04x, peer 0x%08x:%d%s%s%s\n",
+		printf("    VCI 0x%04x, NSEI 0x%04x, peer 0x%08x:%d, %s, %s, %s%s\n",
 		       nsvc->nsvci, nsvc->nsei,
 		       ntohl(peer->sin_addr.s_addr), ntohs(peer->sin_port),
-		       nsvc->state & NSE_S_BLOCKED ? ", blocked" : "",
-		       nsvc->state & NSE_S_ALIVE   ? "" : ", dead",
+		       NS_DESC_A(nsvc->state),
+		       NS_DESC_B(nsvc->state),
+		       NS_DESC_R(nsvc->state),
 		       nsvc->nsvci_is_valid   ? "" : ", invalid VCI"
 		      );
 		dump_rate_ctr_group(stdout, "        ", nsvc->ctrg);