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iommu/of: Support ats-supported device-tree property
Device-tree declares whether a PCI root-complex supports ATS by setting the "ats-supported" property. Copy this flag into device fwspec to let IOMMU drivers quickly check if they can enable ATS for a device. Tested-by: Ketan Patil <[email protected]> Reviewed-by: Jason Gunthorpe <[email protected]> Reviewed-by: Liviu Dudau <[email protected]> Reviewed-by: Robin Murphy <[email protected]> Reviewed-by: Nicolin Chen <[email protected]> Signed-off-by: Jean-Philippe Brucker <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Will Deacon <[email protected]>
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