[RFC][PATCH 0/8] arch/powerpc support for Walnut Board

For those interested, here's my current patch set to get PPC405 support
working in arch/powerpc.

Patches 1, 2, 3, 4, and 5 are probably ready to merge whenever.  The
patches specific to Walnut need some more work before I would consider
those remotely usable.  However, you can use them to build a zImage that
correctly determines the clocking and has a working serial console.

As always, comments welcome.

josh