platform/chrome: unregister platform driver/device when module exit

We have registered platform driver and device when module
init, and need unregister them when module exit.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Olof Johansson <olof@lixom.net>
1 file changed