samsung-laptop: Add quirk for broken acpi_video backlight on N250P

commit e04c200f1f2de8eaa2f5af6d97e7e213a1abb424 upstream.

BugLink: http://bugs.launchpad.net/bugs/1086921
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>