Bluetooth: BREDR: L2CAP: Recover ident when conn is pending

The `ident` of L2CAP BR connection req will be cleared if
function l2cap_br_conn_req_reply called to send L2CAP BR
connection rsp with result `BT_L2CAP_BR_PENDING`.

Then the invalid `ident` (it is zero) will be filled in
the L2CAP BR connection rsp after the ACL connection is
encrypted.

Recover `ident` if the result of the connection rsp is
`BT_L2CAP_BR_PENDING`.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>

Author: lylezhu2012

subsys/bluetooth/host/classic/l2cap_br.c

@@ -1075,6 +1075,9 @@ static void l2cap_br_conn_req(struct bt_l2cap_br *l2cap, uint8_t ident,
 		/* Disconnect link when security rules were violated */
 		if (result == BT_L2CAP_BR_ERR_SEC_BLOCK) {
 			bt_conn_disconnect(conn, BT_HCI_ERR_AUTH_FAIL);
+		} else if (result == BT_L2CAP_BR_PENDING) {
+			/* Recover the ident when conn is pending */
+			br_chan->ident = ident;
 		}
 
 		return;