PCI: Make pci_save_vc_state(), pci_restore_vc_state(), etc private

These Virtual Channel interfaces:

  int pci_save_vc_state(struct pci_dev *dev);
  void pci_restore_vc_state(struct pci_dev *dev);
  void pci_allocate_vc_save_buffers(struct pci_dev *dev);

are only used in drivers/pci/ and do not need to be seen by the rest of the
kernel.  Move them to drivers/pci/pci.h so they're private to the PCI
subsystem.

Link: https://lore.kernel.org/r/20190724233848.73327-5-skunberg.kelsey@gmail.com
Signed-off-by: Kelsey Skunberg <skunberg.kelsey@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

drivers/pci/pci.h

@@ -130,6 +130,11 @@ void pci_vpd_release(struct pci_dev *dev);
 void pcie_vpd_create_sysfs_dev_files(struct pci_dev *dev);
 void pcie_vpd_remove_sysfs_dev_files(struct pci_dev *dev);
 
+/* PCI Virtual Channel */
+int pci_save_vc_state(struct pci_dev *dev);
+void pci_restore_vc_state(struct pci_dev *dev);
+void pci_allocate_vc_save_buffers(struct pci_dev *dev);
+
 /* PCI /proc functions */
 #ifdef CONFIG_PROC_FS
 int pci_proc_attach_device(struct pci_dev *dev);

include/linux/pci.h

@@ -1239,11 +1239,6 @@ bool pcie_relaxed_ordering_enabled(struct pci_dev *dev);
 void pci_wakeup_bus(struct pci_bus *bus);
 void pci_bus_set_current_state(struct pci_bus *bus, pci_power_t state);
 
-/* PCI Virtual Channel */
-int pci_save_vc_state(struct pci_dev *dev);
-void pci_restore_vc_state(struct pci_dev *dev);
-void pci_allocate_vc_save_buffers(struct pci_dev *dev);
-
 /* For use by arch with custom probe code */
 void set_pcie_port_type(struct pci_dev *pdev);
 void set_pcie_hotplug_bridge(struct pci_dev *pdev);