Merge branch 'pci/controller/dwc-intel-gw'

Merge branch 'pci/controller/dwc-intel-gw'

- Enable clock before PHY init for correct ordering (Florian Eckert)

- Add .start_link() callback so the driver works again (Florian Eckert)

- Stop overwriting the ATU base address discovered by
  dw_pcie_get_resources() (Florian Eckert)

- Add DT 'atu' region since this is hardware-specific, and fall back to
  driver default if lacking (Florian Eckert)

* pci/controller/dwc-intel-gw:
  dt-bindings: PCI: intel,lgm-pcie: Add 'atu' resource
  PCI: intel-gw: Fix ATU base address setup and add optional DT 'atu' region
  PCI: intel-gw: Add .start_link() callback
  PCI: intel-gw: Enable clock before PHY init
  PCI: intel-gw: Move interrupt enable to own function
  PCI: intel-gw: Remove unused PCIE_APP_INTX_OFST definition