Merge branch 'pci/atomics'

- Don't enable AtomicOps by RCiEPs since none of them need Atomic Ops and
  we can't tell whether the Root Complex would support them (Gerd Bayer)

- Enable AtomicOps only if we know the Root Port supports them (Gerd Bayer)

* pci/atomics:
  PCI: Update PCIe spec references for AtomicOps
  PCI: Enable AtomicOps only if Root Port supports them
  PCI: Do not enable AtomicOps by RCiEPs

diff --cc drivers/pci/pci.c
Simple merge