The P2SB bus needs to be hidden in some cases so that it does not get
auto-configured by Linux. Add a method for this.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NBin Meng <bmeng.cn@gmail.com>
Reviewed-by: NWolfgang Wallner <wolfgang.wallner@br-automation.com>
Tested-by: NWolfgang Wallner <wolfgang.wallner@br-automation.com>