gsm_04_80: Allow to specify the alert pattern for the notification

Allow to specify the level (not the category) of the notification
this provides an easy way to test it on the phones.
diff --git a/openbsc/include/openbsc/gsm_04_80.h b/openbsc/include/openbsc/gsm_04_80.h
index 0d61dbd..bbf15ef 100644
--- a/openbsc/include/openbsc/gsm_04_80.h
+++ b/openbsc/include/openbsc/gsm_04_80.h
@@ -24,12 +24,12 @@
 			     const struct ussd_request *request);
 
 struct msgb *gsm0480_create_notifySS(const char *text);
-struct msgb *gsm0480_create_unstructuredSS_Notify(const char *text);
+struct msgb *gsm0480_create_unstructuredSS_Notify(int alertLevel, const char *text);
 
 int gsm0480_wrap_invoke(struct msgb *msg, int op, int link_id);
 int gsm0480_wrap_facility(struct msgb *msg);
 
-int gsm0480_send_ussdNotify(struct gsm_subscriber_connection *conn, const char *text);
+int gsm0480_send_ussdNotify(struct gsm_subscriber_connection *conn, int level, const char *text);
 int gsm0480_send_releaseComplete(struct gsm_subscriber_connection *conn);
 
 #endif