On gen7+, CACHE_MODE_0 moved, so we're clobbering some other reg rather
than restoring CACHE_MODE_0.  Don't do that.
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>