!2731 PCI/IOV: Add pci_sriov_numvfs_lock to support enable pci sriov concurrently

Merge Pull Request from: @ci-robot 
 
PR sync from: Jialin Zhang <zhangjialin11@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/EXNMBU6KDST6AEQZZKMW627QFKSWL7XE/ 
 
https://gitee.com/openeuler/kernel/issues/I8BLQX 
 
Link:https://gitee.com/openeuler/kernel/pulls/2731

 

Reviewed-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>