drm/i915: Inline intel_modeset_gem_init()

intel_modeset_gem_init() now only sets up the legacy overlay, so let's
remove the function and call the setup directly during driver load. This
should help us find a better point in the initialisation sequence for it
later.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171110142634.10551-5-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/i915_drv.c

@@ -676,7 +676,7 @@ static int i915_load_modeset_init(struct drm_device *dev)
 	if (ret)
 		goto cleanup_uc;
 
-	intel_modeset_gem_init(dev);
+	intel_setup_overlay(dev_priv);
 
 	if (INTEL_INFO(dev_priv)->num_pipes == 0)
 		return 0;

drivers/gpu/drm/i915/i915_drv.h

@@ -4124,7 +4124,6 @@ void intel_device_info_dump(struct drm_i915_private *dev_priv);
 /* modesetting */
 extern void intel_modeset_init_hw(struct drm_device *dev);
 extern int intel_modeset_init(struct drm_device *dev);
-extern void intel_modeset_gem_init(struct drm_device *dev);
 extern void intel_modeset_cleanup(struct drm_device *dev);
 extern int intel_connector_register(struct drm_connector *);
 extern void intel_connector_unregister(struct drm_connector *);

drivers/gpu/drm/i915/intel_display.c

@@ -15194,13 +15194,6 @@ void intel_display_resume(struct drm_device *dev)
 		drm_atomic_state_put(state);
 }
 
-void intel_modeset_gem_init(struct drm_device *dev)
-{
-	struct drm_i915_private *dev_priv = to_i915(dev);
-
-	intel_setup_overlay(dev_priv);
-}
-
 int intel_connector_register(struct drm_connector *connector)
 {
 	struct intel_connector *intel_connector = to_intel_connector(connector);