Staging: olpc_dcon: Remove obsolete driver

Remove support for One Laptop Per Child organization since it is dead.
http://www.olpcnews.com/about_olpc_news/goodbye_one_laptop_per_child.html

Signed-off-by: Shraddha Barke <shraddha.6596@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>