send a signal for every software activation or failure event report

diff --git a/include/openbsc/signal.h b/include/openbsc/signal.h
index 9fb8cf3..c2cf46a 100644
--- a/include/openbsc/signal.h
+++ b/include/openbsc/signal.h
@@ -36,6 +36,7 @@
 	SS_PAGING,
 	SS_SMS,
 	SS_ABISIP,
+	SS_NM,
 };
 
 /* SS_PAGING signals */
@@ -48,6 +49,12 @@
 	S_ABISIP_BIND_ACK,
 };
 
+/* SS_NM signals */
+enum signal_nm {
+	S_NM_SW_ACTIV_REP,	/* GSM 12.21 software activated report */
+	S_NM_FAIL_REP,		/* GSM 12.21 failure event report */
+};
+
 typedef int signal_cbfn(unsigned int subsys, unsigned int signal,
 			void *handler_data, void *signal_data);