The get() populates the list with the MSI IOVA reserved window.

At the moment an arbitray MSI IOVA window is set at 0x8000000
of size 1MB. This will allow to report those info in iommu-group
sysfs.
Signed-off-by: NEric Auger <eric.auger@redhat.com>
Acked-by: NWill Deacon <will.deacon@arm.com>
Reviewed-by: NTomasz Nowicki <tomasz.nowicki@caviumnetworks.com>
Signed-off-by: NWill Deacon <will.deacon@arm.com>