drm/drm_atomic_helper.c: fix a typo

Signed-off-by: Sui Jingfeng <suijingfeng@loongson.cn>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20230517041602.3225325-1-suijingfeng@loongson.cn

drivers/gpu/drm/drm_atomic_helper.c

@@ -3154,7 +3154,7 @@ int drm_atomic_helper_update_plane(struct drm_plane *plane,
 EXPORT_SYMBOL(drm_atomic_helper_update_plane);
 
 /**
- * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic
+ * drm_atomic_helper_disable_plane - Helper for primary plane disable using atomic
  * @plane: plane to disable
  * @ctx: lock acquire context
  *