drm/atomic-helper: Change parameter name of drm_atomic_helper_cleanup_planes()

drm_atomic_helper_cleanup_planes() is one of the final part of a commit,
and will free up all plane resources used in the previous commit.  It
takes the drm_atomic_state being committed as a parameter.

However, that parameter name is called (and documented) as old_state,
which is pretty confusing. Let's rename that variable as state.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20250213-bridge-connector-v3-24-e71598f49c8f@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org>

Author: mripard

drivers/gpu/drm/drm_atomic_helper.c

@@ -2989,24 +2989,24 @@ EXPORT_SYMBOL(drm_atomic_helper_disable_planes_on_crtc);
 /**
  * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit
  * @dev: DRM device
- * @old_state: atomic state object with old state structures
+ * @state: atomic state object being committed
  *
  * This function cleans up plane state, specifically framebuffers, from the old
- * configuration. Hence the old configuration must be perserved in @old_state to
+ * configuration. Hence the old configuration must be perserved in @state to
  * be able to call this function.
  *
  * This function may not be called on the new state when the atomic update
  * fails at any point after calling drm_atomic_helper_prepare_planes(). Use
  * drm_atomic_helper_unprepare_planes() in this case.
  */
 void drm_atomic_helper_cleanup_planes(struct drm_device *dev,
-				      struct drm_atomic_state *old_state)
+				      struct drm_atomic_state *state)
 {
 	struct drm_plane *plane;
 	struct drm_plane_state *old_plane_state;
 	int i;
 
-	for_each_old_plane_in_state(old_state, plane, old_plane_state, i) {
+	for_each_old_plane_in_state(state, plane, old_plane_state, i) {
 		const struct drm_plane_helper_funcs *funcs = plane->helper_private;
 
 		if (funcs->cleanup_fb)