drm/i915: move FBC vfuncs to struct i915_fbc

Because it makes more sense there, IMHO.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 3c2425f..aefcf02 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3134,8 +3134,8 @@
 	struct drm_device *dev = crtc->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 
-	if (dev_priv->display.disable_fbc)
-		dev_priv->display.disable_fbc(dev);
+	if (dev_priv->fbc.disable_fbc)
+		dev_priv->fbc.disable_fbc(dev);
 
 	dev_priv->display.update_primary_plane(crtc, fb, x, y);