Small fixes for the Ebony device tree

[Segher Boessenkool]

> Why "ibm,xxx"? Is this for the CPU core? Or for the SDRAM controller 
> core?

For whatever is behind the comma.  The prefixes are
meant to give each manufacturer his own namespace,
to reduce the number of name collisions.

> Both are not IBM in this case.

Yeah.

> I forgot the new 405EX which will be equipped with a DDR2 controller 
> (not sure
> right now if it's the Denali or the other core right now). So we should
> probably drop this 40x/44x completely. Does this make sense?

Yes.  To claim compatibility to a family of devices,
specify the oldest part, or the most popular part,
or a few parts if different generations added more
features (and this part is compatible with those).


Segher