Bluetooth: Add support for removing LTK's when pairing is removed

Instead of having a separated command for removing SMP keys, we use the
Remove Keys command to remove *all* keys.

Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>

net/bluetooth/mgmt.c

@@ -1089,6 +1089,12 @@ static int remove_keys(struct sock *sk, u16 index, void *data, u16 len)
 	bacpy(&rp.bdaddr, &cp->bdaddr);
 	rp.status = MGMT_STATUS_FAILED;
 
+	err = hci_remove_ltk(hdev, &cp->bdaddr);
+	if (err < 0) {
+		err = cmd_status(sk, index, MGMT_OP_REMOVE_KEYS, -err);
+		goto unlock;
+	}
+
 	err = hci_remove_link_key(hdev, &cp->bdaddr);
 	if (err < 0) {
 		rp.status = MGMT_STATUS_NOT_PAIRED;