[PATCH] ibm ocp gpio

The most common thing I want to use the GPIO pins for is
simple lighting of some LED's. I decided to roll in some timers
into the generic GPIO driver rather than haveing each user of the
GPIO driver be forced to do some form of timers to get a usable
LED visual as well.

I think I got the timer stuff correct but I am not sure.
I didn't bother cleaning it up until I get some feedback on it.