ACPI: delelte more BFS/GTS related definition and code

This is a follow on for commmit 3f6f49c7

 "ACPI: delete _GTS/_BFS support"
to do more cleanup.

Signed-off-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>