Dave,
I talked with the C66x driver team, they are having someone take a look at this.
I also filed a bug for the evmOMAPL138, for which we (at my site) have control over the driver sources. I'll ask the C66x team to file a bug or duplicate this one for their driver:
SDOCM00112837 - OMAPL138 driver adds redundant 4 byte FCS padding causing errors to show in Wireshark
Steve