Bluetooth: Use special function to send filter management index events

For sending Index Added, Index Removed, Unconfigured Index Added and
Unconfigured Index Removed managment events the new helper functions
allows taking into account if these events are enabled for a certain
management socket or not.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index d942fed..0995ec75 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -179,6 +179,12 @@
 	HCI_RESET,
 };
 
+/* HCI socket flags */
+enum {
+	HCI_MGMT_INDEX_EVENTS,
+	HCI_MGMT_UNCONF_INDEX_EVENTS,
+};
+
 /*
  * BR/EDR and/or LE controller flags: the flags defined here should represent
  * states from the controller.