drm/i915: Capture CCID on ILK

CCID register existed already on ILK according to the PRM (Chris
verified the address to match too).

Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1493366019-18380-1-git-send-email-joonas.lahtinen@linux.intel.com