Staging: add Samsung Laptop driver

This is a drive for the Samsung N128 laptop to control the wireless LED
and backlight.

Many thanks to Joey Lee for his help in testing and finding all of my
bugs in the development of this driver, it has been invaluable.

Cc: Joey Lee <jlee@novell.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>