Disable BAT for 970

The 970 doesn't know BAT, so let's not search BATs there.
This was only in as a hack for OpenHackWare so it would
work on PPC64.

Signed-off-by: Alexander Graf <alex@csgraf.de>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6759 c046a42c-6fe2-441c-8c8c-71466251a162
