hci_remove_link_key
int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
hci_remove_link_key(hdev, &conn->dst);
hci_remove_link_key(hdev, &conn->dst);
hci_remove_link_key(hdev, &conn->dst);
err = hci_remove_link_key(hdev, &cp->addr.bdaddr);
hci_remove_link_key(hdev, &addr->bdaddr);