Merge branch 'pci/enumeration'

  - Add PCIe 32 GT/s speed decoding for sysfs "max_link_speed" and dmesg
    notes about available bandwidth (Yicong Yang)

  - Simplify and unify PCI bus/link speed reporting (Yicong Yang)

* pci/enumeration:
  PCI: Add PCIE_LNKCAP2_SLS2SPEED() macro
  PCI: Use pci_speed_string() for all PCI/PCI-X/PCIe strings
  PCI: Add pci_speed_string()
  PCI: Add 32 GT/s decoding in some macros