staging: remove obsoleted CS5535/CS5536 GPIO driver

It is scheduled to be removed.

Acked-by: Andres Salomon <dilinger@queued.net>
Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
6 files changed