drm/modes: stop handling framebuffer special

Since ref counting is in the object now we can just call the
normal interfaces.
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/drm_crtc.c

@@ -4850,19 +4850,7 @@ bool drm_property_change_valid_get(struct drm_property *property,
 		if (value == 0)
 			return true;
 
-		/* handle refcnt'd objects specially: */
-		if (property->values[0] == DRM_MODE_OBJECT_FB) {
-			struct drm_framebuffer *fb;
-			fb = drm_framebuffer_lookup(property->dev, value);
-			if (fb) {
-				*ref = &fb->base;
-				return true;
-			} else {
-				return false;
-			}
-		} else {
-			return _object_find(property->dev, value, property->values[0]) != NULL;
-		}
+		return _object_find(property->dev, value, property->values[0]) != NULL;
 	}
 
 	for (i = 0; i < property->num_values; i++)
@@ -4878,8 +4866,7 @@ void drm_property_change_valid_put(struct drm_property *property,
 		return;
 
 	if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) {
-		if (property->values[0] == DRM_MODE_OBJECT_FB)
-			drm_framebuffer_unreference(obj_to_fb(ref));
+		drm_mode_object_unreference(ref);
 	} else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB))
 		drm_property_unreference_blob(obj_to_blob(ref));
 }