Add support for the lbarx, lharx, stbcx and sthcs instructions.

The instructions are part of the ISA 2.06 but were not implemented
in all versions of hardware.  The four instructions are all supported
in ISA 2.07.  The instructions were put under the ISA 2.07 category
of supported instructions in this patch.

The bugzilla for this issue is 346324.

git-svn-id: svn:// 8f6e269a-dfd6-0310-a8e1-e2731360e62c
3 files changed