drm/i915: prefer for_each_intel_* macros for iteration

Use the for_each_intel_* macros for iterating intel_encoder,
intel_connector, and intel_crtc. No functional changes.

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450262896-5325-1-git-send-email-jani.nikula@intel.com
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index ee84b51..2786f48 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -15823,7 +15823,7 @@
 void intel_modeset_cleanup(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct drm_connector *connector;
+	struct intel_connector *connector;
 
 	intel_disable_gt_powersave(dev);
 
@@ -15850,12 +15850,8 @@
 	flush_scheduled_work();
 
 	/* destroy the backlight and sysfs files before encoders/connectors */
-	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
-		struct intel_connector *intel_connector;
-
-		intel_connector = to_intel_connector(connector);
-		intel_connector->unregister(intel_connector);
-	}
+	for_each_intel_connector(dev, connector)
+		connector->unregister(connector);
 
 	drm_mode_config_cleanup(dev);