Bluetooth: Report proper error number in disconnection

If encryption change fails we should disconnect with auth failure error
code.

Signed-off-by: Gustavo Padovan <gustavo@padovan.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>

net/bluetooth/hci_event.c

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 9c60e0d..4eefb7f 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -2063,7 +2063,7 @@
 		clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
 
 		if (ev->status && conn->state == BT_CONNECTED) {
-			hci_acl_disconn(conn, 0x13);
+			hci_acl_disconn(conn, HCI_ERROR_AUTH_FAILURE);
 			hci_conn_put(conn);
 			goto unlock;
 		}