iommu/vt-d: Fix crash when accessing VT-d sysfs entries
The link between the iommu sysfs-device and the struct intel_iommu is no longer stored as driver-data. Update the code to use the new access method. Reported-by: NDave Jones <davej@codemonkey.org.uk> Fixes: 39ab9555 ('iommu: Add sysfs bindings for struct iommu_device') Signed-off-by: NJoerg Roedel <jroedel@suse.de>
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