Merge branch 'pci/ctrl/loongson'

- Wrap ARM64-specific MCFG quirks in #ifdef so Loongson can use the file
  (Huacai Chen)

- Use generic (not 32-bit only) config accesses for LS2K/LS7A (Huacai Chen)

- Add ACPI and MCFG support for Loongson LS7A (Huacai Chen)

- Avoid config reads to non-existent LS2K/LS7A devices because a hardware
  defect causes machine hangs (Huacai Chen)

- Work around LS7A integrated devices that report incorrect Interrupt Pin
  values (Jianmin Lv)

* pci/ctrl/loongson:
  PCI: loongson: Work around LS7A incorrect Interrupt Pin registers
  PCI: loongson: Don't access non-existent devices
  PCI: loongson: Add ACPI init support
  PCI: loongson: Use generic 8/16/32-bit config ops on LS2K/LS7A
  PCI/ACPI: Guard ARM64-specific mcfg_quirks