debug log for sms: fix/add

One logged the wrong function name. Add others.

Change-Id: Ied5d8e84d5d192c826bc131be8907eaa55190479
diff --git a/openbsc/src/libmsc/vty_interface_layer3.c b/openbsc/src/libmsc/vty_interface_layer3.c
index fd3771a..6f0006c 100644
--- a/openbsc/src/libmsc/vty_interface_layer3.c
+++ b/openbsc/src/libmsc/vty_interface_layer3.c
@@ -176,6 +176,7 @@
 		sms_free(sms);
 		return CMD_WARNING;
 	}
+	LOGP(DLSMS, LOGL_DEBUG, "SMS stored in DB\n");
 
 	sms_free(sms);
 	sms_queue_trigger(receiver->group->net->sms_queue);