Bluetooth: Add debugfs entry to show Secure Connections Only mode

For debugging purposes of Secure Connection Only support a simple
debugfs entry is used to indicate if this mode is active 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 0064a9a..232c078 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -124,6 +124,7 @@
 	HCI_LE_SCAN,
 	HCI_SSP_ENABLED,
 	HCI_SC_ENABLED,
+	HCI_SC_ONLY,
 	HCI_HS_ENABLED,
 	HCI_LE_ENABLED,
 	HCI_ADVERTISING,