Update the IOMMU default domain address width to 57 bits. This would
enable the IOMMU to do upto 5-levels of paging for second level
translations - IOVA translation requests without PASID.

Even though the maximum supported address width is being increased to
57, __iommu_calculate_agaw() would set the actual supported address
width to the maximum support available in IOMMU hardware.
Signed-off-by: NSohil Mehta <sohil.mehta@intel.com>
Signed-off-by: NJoerg Roedel <jroedel@suse.de>