More Ethernet initialization rework

Hello,

This patch set moves initialization of most Ethernet controllers to board or CPU code. A few of the more complicated ones remain, but the goal is to implement this on all controllers.

Changes with v2:

1. Incorporate suggestions by Haavard for additional AVR32 boards and
to fix warnings
2. Rebased against current TOT + Andy Fleming's TSEC changes
3. A few small changes to fix warnings and errors when building ARM

These have been compiled tested for MAKEALL ppc (eldk 4.2), MAKEALL arm (latest codesourcery binary) and MAKEALL avr32. I lacked the tools to test other architectures.

Patches have been pushed to the net repo: git://git.denx.de/u-boot-net.git

regards,
Ben