orion/kirkwood and device tree

[Andrew Lunn]

> Beware. Moving the DRAM window setup code out of the various drivers is 
> not necessarily a good idea.  This setup is different from one 
> peripheral to another, and the associated registers are highly 
> peripheral specific.

Yes, i've noticed this. However, the core of the code is the same in
every case. So i think it should be possible. We will see.

      Andrew