[PATCH][RFC]Updated MPC I2C driver

This version should support MPC8540 as well as MPC8245 and MPC107. I
don't have MPC85xx hardware, so I'd like feedback from people who do.

To use it on MPC107/824x requires the OCP patch that went by on the list
on Tuesday. The support for MPC85xx is already in the kernel.

If nobody has any complaints I'm ready to send it to Greg K-H.

- Adrian Cox
Humboldt Solutions Ltd.