RFC on mem_pieces to LMB work

[Paul Mackerras]

Jon Loeliger writes:

> How would you like to accept some work on converting
> mem_pieces to LMB?

I started to look at this but got sidetracked on some other stuff.
Your option 2 looks like what I was thinking of.  Of course, since
everybody has a device tree with at least one /memory node (right? :)
we can just populate the LMB struct from the device tree
unconditionally.  (This point led me to looking at the patches for
importing the flattened device tree into ppc32.)

Paul.