Bluetooth: hci_sync: Fix attempting to send HCI_Disconnect to BIS handle

BIS/PA connections do have their own cleanup proceedure which are
performed by hci_conn_cleanup/bis_cleanup.

Fixes: 23205562ff ("Bluetooth: separate CIS_LINK and BIS_LINK link types")
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

net/bluetooth/hci_sync.c

@@ -5493,7 +5493,7 @@ static int hci_disconnect_sync(struct hci_dev *hdev, struct hci_conn *conn,
 {
 	struct hci_cp_disconnect cp;
 
-	if (test_bit(HCI_CONN_BIG_CREATED, &conn->flags)) {
+	if (conn->type == BIS_LINK) {
 		/* This is a BIS connection, hci_conn_del will
 		 * do the necessary cleanup.
 		 */