If we initialize *all* of the region registers to be non-identity mapped we
can catch a few more bugs that might be covered up by whatever their previous
state was.  This patch sets them all up to use VHPT (i.e. non alt-tlb)
address translation.  It already helped me find one bug in the sn2
initialization code.
Signed-off-by: Jesse Barnes <jbarnes@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>