The caching options for page table entries have remained the same as
Cherryview. This patch fixes it so the right code path is taken on BXT.

v2: Fix up commit message (Mike)
Signed-off-by: NSumit Singh <sumit.k.singh@intel.com>
Signed-off-by: NDamien Lespiau <damien.lespiau@intel.com>
Reviewed-by: NSivakumar Thulasimani <sivakumar.thulasimani@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>