This patch implements the features required for the HAVE_PCI_LEGACY code in
sysfs.  It allows userspace applications to access legacy I/O ports an memory
space using files in sysfs on a per-bus basis.  Tested on sn2, but it
*should* work on other ia64 platforms as well (though zx1 will probably need
machine vectors to do routing of non-base busses).
Signed-off-by: Jesse Barnes <jbarnes@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>