Update driver to use generic DDC reading

[khali@linux-fr.org: fix oops in i2c handling]
Signed-off-by: NAntonino Daplas <adaplas@pol.net>
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Cc: Jurriaan <thunder7@xs4all.nl>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>