The Ethernet Phy driver was not written to support anything other than full Ethernet auto-negotiation. While troubleshooting the Ethernet issues on the Rev H hardware, we needed to be able to experiment with forcing different aspects of the ethernet Phy. This involved edits to the Phy KSZ8041 driver and we added some configuration bit options to the MQX enet configuration.

In addition, the Phy driver now configures the default register values rather than relying on boot strapping, good or bad, to do it.