Patch to disable SGI TIOCA GART TLB prefetching due to hw bug.
Signed-off-by: NMark Maule <maule@sgi.com>
Signed-off-by: NTony Luck <tony.luck@intel.com>

Provide a driver for the altix TIOCA AGP chipset.  An agpgart backend will
be provided as a separate patch.
Signed-off-by: NMark Maule <maule@sgi.com>
Signed-off-by: NTony Luck <tony.luck@intel.com>