PCI: Add #defines for some of PCIe spec r4.0 features
Add #defines only for the Data Link Feature and Physical Layer 16.0 GT/s features as defined in PCIe spec r4.0, sec 7.7.4 for Data Link Feature and sec 7.7.5 for Physical Layer 16.0 GT/s. Signed-off-by: NVidya Sagar <vidyas@nvidia.com> Signed-off-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com> Reviewed-by: NThierry Reding <treding@nvidia.com> Acked-by: NBjorn Helgaas <bhelgaas@google.com>
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