This patch adds documentation for the usage model of the control method lid
device on some buggy platforms.
Signed-off-by: NLv Zheng <lv.zheng@intel.com>
Acked-by: NBenjamin Tissoires <benjamin.tissoires@gmail.com>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>