Revert "PCI: fix kabi change in struct pci_bus"

hulk inclusion
category: bugfix
bugzilla: 30939
CVE: NA

---------------------------

The kabi can be broken before official release.

This reverts commit 8664b79edac95322379eee025763ba0840d458d1.

Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-By: Xie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>