PCI: thunder-pem: Add constant for custom ".bus_shift" initialiser
Add a custom constant for the ".bus_shift" initialiser to capture a non-standard platform-specific ECAM bus shift value. Standard values otherwise defined in the PCI Express Specification are available in the include/linux/pci-ecam.h. Suggested-by: NBjorn Helgaas <bhelgaas@google.com> Link: https://lore.kernel.org/r/20201129230743.3006978-3-kw@linux.comSigned-off-by: NKrzysztof Wilczyński <kw@linux.com> Signed-off-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>
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