Device tree aware EMAC driver

This is BenH's rewritten, device tree aware driver for the IBM/AMCC
EMAC, ethernet MAC controller ASIC found on various 4xx CPUs and also
the Axon bridge.
	- Updated to build on current kernels
	- Removed device_type matching requirement on MAL and ZMII, to
match current best practice of omitting device_type unless a
well-defined class binding exists.
	- Added documentation to booting-without-of.txt for the EMAC
binding.

Signed-off-by: David Gibson <redacted>

Download from:

http://ozlabs.org/~dgibson/home/emac/powerpc-emac-new-20070530.patch

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson