drm/i915: Fix up KMS Kconfig removal patch

The module pciid list got lost, but somehow most distros seem to
force-load drm drivers early and no one noticed for a while.

Bug introduced in

commit fd930478
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Fri Jun 19 20:27:27 2015 +0100

    drm/i915: Remove KMS Kconfig option

Reported-by: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Damien Lespiau <damien.lespiau@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>