This patch adds NUMA locality info to sba_iommu, allowing coherent
DMA mappings to be allocated from the node nearest to the I/O.  This
patch isn't dependent on the previous pxm_to_nid_map fixup, but may be
sub-optimal in some cases without it.  Thanks
Signed-off-by: Alex Williamson <alex.williamson@hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>