This is a message on the debug output in case the Colibri can't initialize the Ethernet controller.
Most common reason is that the Ethernet cable is not connected or that the jumper for the Ethernet is in the wrong position.
Required Jumper positions: Colibri Colibri Colibri Base Board Jumper PXA270 PXA3xx T20
Evalboard JP6 1-2 2-3 2-3 Orchid JP2 1-2 2-3 2-3 Protea JP2 1-2 2-3 2-3 Tellurium X9 1-2 2-3 2-3
For more information see also the Colibri Evaluation Board schematics.