Log TRAU FSM at INFO not NOTICE

During normal operations, osmo-mgw floods the log/vty at level NOTICE with:

 Received Event RX_BITS (trau_sync.c:525)

Change-Id: Ib4c5ac130e766906361c63090b30111970343075
diff --git a/src/trau/trau_sync.c b/src/trau/trau_sync.c
index 89c5558..dba9cd1 100644
--- a/src/trau/trau_sync.c
+++ b/src/trau/trau_sync.c
@@ -487,7 +487,7 @@
 	if (pat_id >= ARRAY_SIZE(sync_patterns))
 		return NULL;
 
-	fi = osmo_fsm_inst_alloc(&trau_sync_fsm, ctx, NULL, LOGL_NOTICE, name);
+	fi = osmo_fsm_inst_alloc(&trau_sync_fsm, ctx, NULL, LOGL_INFO, name);
 	if (!fi)
 		return NULL;
 	tss = talloc_zero(fi, struct trau_rx_sync_state);