PCI: Add ACS quirk for iProc PAXB
iProc PAXB Root Ports don't advertise an ACS capability, but they do not
allow peer-to-peer transactions between Root Ports. Add an ACS quirk so
each Root Port can be in a separate IOMMU group.
[bhelgaas: commit log, comment, use common implementation style]
Link: https://lore.kernel.org/r/1566275985-25670-1-git-send-email-srinath.mannam@broadcom.com
Signed-off-by: Abhinav Ratna <abhinav.ratna@broadcom.com>
Signed-off-by: Srinath Mannam <srinath.mannam@broadcom.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Scott Branden <scott.branden@broadcom.com>
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