[PATCH] IBM ocp I2C

[andrew may]

Would anyone be heartbroken if "struct i2c_algo_iic_data" went
away completely?

In this patch I dump getown and getclock because they aren't
used and I am sure there is a better way to do things.

Also calculate the I2C div value from the clock rate. I am
not sure if that will work on all 4xx types but it does the
right thing for my 405's.

I also fixed a few C++ style comments.

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