drm/i915: Convert overlay->{active, pfit_active} to bools

overlay.{active,pfit_active} are just on/off flags, so make them bool.

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