Bluetooth: Rename HCI_DEBUG_KEYS to HCI_KEEP_DEBUG_KEYS

We're planning to add a flag to actively use debug keys in addition to
simply just accepting them, which makes the current generically named
DEBUG_KEYS flag a bit confusing. Since the flag in practice affects
whether the kernel keeps debug keys around or not rename it to
HCI_KEEP_DEBUG_KEYS.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index 6b8371d..ffb489e 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -124,7 +124,7 @@
 	HCI_MGMT,
 	HCI_PAIRABLE,
 	HCI_SERVICE_CACHE,
-	HCI_DEBUG_KEYS,
+	HCI_KEEP_DEBUG_KEYS,
 	HCI_UNREGISTER,
 	HCI_USER_CHANNEL,