[Arm-dev] Updated to current C7 and lost OdroidHC1 ethernet

I had an install of C7-1810 from 3 years ago on an Odroid HC1 that I powered up yesterday.

I did a yum update that took it all the way to C7.9, and I lost my ethernet.  It is not showing at all.

Ideas on what to do for this?  It should not take too much to go back to what I had before and start a new.  Or use a different starting image.

thanks