driver core: attribute_container: fix W=1 warnings

driver core: attribute_container: fix W=1 warnings

Fix the following make W=1 kernel build warnings:

  drivers/base/attribute_container.c:304: warning: Function parameter or member 'fn' not described in 'attribute_container_device_trigger_safe'
  drivers/base/attribute_container.c:304: warning: Function parameter or member 'undo' not described in 'attribute_container_device_trigger_safe'
  drivers/base/attribute_container.c:357: warning: Function parameter or member 'fn' not described in 'attribute_container_device_trigger'

Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20210512072233.3817056-1-yangyingliang@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>