!4109 PCI: add a member in 'struct pci_bus' to record the original 'pci_ops'

Merge Pull Request from: @ci-robot 
 
PR sync from: Xiongfeng Wang <wangxiongfeng2@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/CXQ5PBYPI4HEBYKRZ6ANJE4PEDBE67TE/ 
 
https://gitee.com/openeuler/kernel/issues/I8XW3M 
 
Link:https://gitee.com/openeuler/kernel/pulls/4109

 

Reviewed-by: Xie XiuQi <xiexiuqi@huawei.com>
Reviewed-by: Jialin Zhang <zhangjialin11@huawei.com>
Reviewed-by: Wei Li <liwei391@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>