[Linaro-validation] FVP failed to enable adb over tcp

Hi, Dave

Our fvp build failed to boot on LAVA because of the failure of enabling adb over tcp, seems not able to get the ip address for the eth0 interface.

The failed job is here: https://validation.linaro.org/scheduler/job/517934/log_file#L_1444

But the same build boot successfully on LAVA one day before: https://validation.linaro.org/scheduler/job/515801/log_file#L_242

I am not sure if the problem is caused by configurations for device or change of lava framework. But could you please help to check the problem first?