gprs_ns2: drop prefix of all internal exposed function

All functions which are exposed by gprs_ns2_internal.h should not contain
the public prefix gprs_. Internal function should only contain ns2_ prefix.

Change-Id: Icecc5a918902cd10efac72bbac20780d39aab272
diff --git a/tests/gb/gprs_ns2_test.c b/tests/gb/gprs_ns2_test.c
index 10f430d..335a079 100644
--- a/tests/gb/gprs_ns2_test.c
+++ b/tests/gb/gprs_ns2_test.c
@@ -254,7 +254,7 @@
 		OSMO_ASSERT(nsvc[i]);
 		nsvc[i]->fi->state = 3;	/* HACK: 3 = GPRS_NS2_ST_UNBLOCKED */
 		/* ensure the fi->state works correct */
-		OSMO_ASSERT(gprs_ns2_vc_is_unblocked(nsvc[i]));
+		OSMO_ASSERT(ns2_vc_is_unblocked(nsvc[i]));
 		ns2_nse_notify_unblocked(nsvc[i], true);
 	}
 
@@ -277,7 +277,7 @@
 	nsh->pdu_type = NS_PDUT_UNBLOCK_ACK;
 	ns2_recv_vc(nsvc[0], msg);
 
-	OSMO_ASSERT(gprs_ns2_vc_is_unblocked(nsvc[0]));
+	OSMO_ASSERT(ns2_vc_is_unblocked(nsvc[0]));
 	gprs_ns2_free(nsi);
 	printf("--- Finish NSE block unblock nsvc\n");
 }
@@ -330,11 +330,11 @@
 		nsvc[i] = ns2_vc_alloc(bind[i], nse, false, NS2_VC_MODE_BLOCKRESET, idbuf);
 		loop[i] = loopback_nsvc(loopbind, nsvc[i]);
 		OSMO_ASSERT(nsvc[i]);
-		gprs_ns2_vc_fsm_start(nsvc[i]);
-		OSMO_ASSERT(!gprs_ns2_vc_is_unblocked(nsvc[i]));
+		ns2_vc_fsm_start(nsvc[i]);
+		OSMO_ASSERT(!ns2_vc_is_unblocked(nsvc[i]));
 		ns2_tx_reset(loop[i], NS_CAUSE_OM_INTERVENTION);
 		ns2_tx_unblock(loop[i]);
-		OSMO_ASSERT(gprs_ns2_vc_is_unblocked(nsvc[i]));
+		OSMO_ASSERT(ns2_vc_is_unblocked(nsvc[i]));
 	}
 
 	/* both nsvcs are unblocked and alive */