!6099 vfio/pci: Lock external INTx masking ops

Merge Pull Request from: @ci-robot 
 
PR sync from: Yang Yingliang <yangyingliang@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/4KIAA5BIADVYVP32OPWSOB5MVUEECLLZ/ 
 
https://gitee.com/src-openeuler/kernel/issues/I9E6TS 
 
Link:https://gitee.com/openeuler/kernel/pulls/6099

 

Reviewed-by: Liu YongQiang <liuyongqiang13@huawei.com>
Reviewed-by: Xie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>