PCI: fix kabi change in struct pci_bus

hulk inclusion
category: bugfix
bugzilla: NA
CVE: NA

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

Fix kabi change in struct pci_bus since the following patch.
12de28f380a9 ("PCI: add a member in 'struct pci_bus' to record the
original 'pci_ops'")
Signed-off-by: NXiongfeng Wang <wangxiongfeng2@huawei.com>
Reviewed-by: NHanjun Guo <guohanjun@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

include/linux/pci.h

@@ -584,7 +584,6 @@ struct pci_bus {
 	struct resource busn_res;	/* Bus numbers routed to this bus */
 
 	struct pci_ops	*ops;		/* Configuration access functions */
-	struct pci_ops	*backup_ops;
 	struct msi_controller *msi;	/* MSI controller */
 	void		*sysdata;	/* Hook for sys-specific extension */
 	struct proc_dir_entry *procdir;	/* Directory entry in /proc/bus/pci */
@@ -606,8 +605,11 @@ struct pci_bus {
 	struct bin_attribute	*legacy_io;	/* Legacy I/O for this bus */
 	struct bin_attribute	*legacy_mem;	/* Legacy mem */
 	unsigned int		is_added:1;
-
+#ifndef __GENKSYMS__
+	struct pci_ops	*backup_ops;
+#else
 	KABI_RESERVE(1)
+#endif
 	KABI_RESERVE(2)
 	KABI_RESERVE(3)
 	KABI_RESERVE(4)