iommu: Add function to query the default domain of a group
This will be used to handle unity mappings in the iommu
drivers.
Signed-off-by: NJoerg Roedel <jroedel@suse.de>
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This will be used to handle unity mappings in the iommu
drivers.
Signed-off-by: NJoerg Roedel <jroedel@suse.de>