Bluetooth: Introduce HCI_DEV_OPEN and HCI_DEV_CLOSE events

When opening the HCI transport via hdev->open send HCI_DEV_OPEN event
and when closing the HCI transport via hdev->close send HCI_DEV_CLOSE.

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 7ca6690..e7f938c 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -44,6 +44,8 @@
 #define HCI_DEV_DOWN			4
 #define HCI_DEV_SUSPEND			5
 #define HCI_DEV_RESUME			6
+#define HCI_DEV_OPEN			7
+#define HCI_DEV_CLOSE			8
 
 /* HCI notify events */
 #define HCI_NOTIFY_CONN_ADD		1