Fix driver to work with newer kernel versions

A recent Fedora kernel update (v2.6.34.6-47.fc13) broke your
samsung-backlight module due to an extra argument being added; I
managed to fix it with the attached patch.

As many Fedora HOW-TO sites list your GitHub repo as a resource, I
think it would be beneficial to share it and perhaps push it to said
repo. I've tested it on my machines (plural).
Added README saying this repo is now old and not to be used.
Merge remote-tracking branch 'origin/master'
Add the 'modules_install' target

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>