WPS: Add PBC overlap and timeout events from WPS module

This provides information about PBC mode result from the WPS Registrar
module. This could be used, e.g., to provide a user notification on the
AP UI on PBC failures.

wpa_supplicant/wps_supplicant.c

@@ -426,6 +426,10 @@ static void wpa_supplicant_wps_event(void *ctx, enum wps_event event,
 		break;
 	case WPS_EV_PWD_AUTH_FAIL:
 		break;
+	case WPS_EV_PBC_OVERLAP:
+		break;
+	case WPS_EV_PBC_TIMEOUT:
+		break;
 	}
 }