drm/i915: don't set up rings on gen6+ for non-kms

It's not supported, and with the patch to refuse loading on gen6+
without kms enabled, there's also no way we can hit this.

Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
1 file changed