PCI/ASPM: Unexport internal ASPM interfaces

Several of the interfaces defined in include/linux/pci-aspm.h are used only
internally from the PCI core:

  pcie_aspm_init_link_state()
  pcie_aspm_exit_link_state()
  pcie_aspm_pm_state_change()
  pcie_aspm_powersave_config_link()
  pcie_aspm_create_sysfs_dev_files()
  pcie_aspm_remove_sysfs_dev_files()

Move these to the internal drivers/pci/pci.h header so they don't clutter
the driver interface.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index f6b58b3..e90009f 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -342,6 +342,26 @@ static inline resource_size_t pci_resource_alignment(struct pci_dev *dev,
 
 void pci_enable_acs(struct pci_dev *dev);
 
+#ifdef CONFIG_PCIEASPM
+void pcie_aspm_init_link_state(struct pci_dev *pdev);
+void pcie_aspm_exit_link_state(struct pci_dev *pdev);
+void pcie_aspm_pm_state_change(struct pci_dev *pdev);
+void pcie_aspm_powersave_config_link(struct pci_dev *pdev);
+#else
+static inline void pcie_aspm_init_link_state(struct pci_dev *pdev) { }
+static inline void pcie_aspm_exit_link_state(struct pci_dev *pdev) { }
+static inline void pcie_aspm_pm_state_change(struct pci_dev *pdev) { }
+static inline void pcie_aspm_powersave_config_link(struct pci_dev *pdev) { }
+#endif
+
+#ifdef CONFIG_PCIEASPM_DEBUG
+void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev);
+void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev);
+#else
+static inline void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev) { }
+static inline void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev) { }
+#endif
+
 #ifdef CONFIG_PCIE_PTM
 void pci_ptm_init(struct pci_dev *dev);
 #else