drm/i915: Prepare the connector/encoder mask readout for hw vs. uapi state split

	drm_connector_list_iter_begin(dev, &conn_iter);

	for_each_intel_connector_iter(connector, &conn_iter) {

		if (connector->get_hw_state(connector)) {

			struct intel_crtc_state *crtc_state;

			struct intel_crtc *crtc;

			connector->base.dpms = DRM_MODE_DPMS_ON;

			encoder = connector->encoder;

			connector->base.encoder = &encoder->base;

			if (encoder->base.crtc &&

			    encoder->base.crtc->state->active) {

			crtc = to_intel_crtc(encoder->base.crtc);

			crtc_state = crtc ? to_intel_crtc_state(crtc->base.state) : NULL;

			if (crtc_state && crtc_state->base.active) {

				/*

				 * This has to be done during hardware readout

				 * because anything calling .crtc_disable may

				 * rely on the connector_mask being accurate.

				 */

				encoder->base.crtc->state->connector_mask |=

				crtc_state->base.connector_mask |=

					drm_connector_mask(&connector->base);

				encoder->base.crtc->state->encoder_mask |=

				crtc_state->base.encoder_mask |=

					drm_encoder_mask(&encoder->base);

			}

		} else {

			connector->base.dpms = DRM_MODE_DPMS_OFF;

			connector->base.encoder = NULL;