drm/i915: Add display_display_mmio_offset to intel_device_info

Add an optional offset to intel_device_info, which will added
to most display register offsets.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
1 file changed