Merge branch 'pci/controller/rockchip'

- Drop unused PCIe Message routing and code definitions (Hans Zhang)

- Use standard PCIe config register definitions instead of
  rockchip-specific redefinitions (Geraldo Nascimento)

- Set Target Link Speed to 5.0 GT/s before retraining so we have a chance
  to train at a higher speed (Geraldo Nascimento)

* pci/controller/rockchip:
  PCI: rockchip: Set Target Link Speed to 5.0 GT/s before retraining
  PCI: rockchip: Use standard PCIe definitions
  PCI: rockchip: Remove redundant PCIe message routing definitions