Hello,
The driver you are looking for (SMSC95XX) was recently added to our kernel build. It has not made its way to a platform release yet so you'll have to build kernel and flash your device with it.
From the information given, I believe you are on the VOXL2 platform. If this assumption is incorrect let me know and I'll link the instructions for building the VOXL1 kernel.
Here are the instructions for building the VOXL2 kernel. In order to build the kernel, you'll want to clone this qrb5165-kernel-build-docker repository. This project builds a docker image that we then use in order to build the kernel for the qrb5165 (VOXL2) device. For instructions on how to do so, you can look at our VOXL2 Kernel Build Guide.
Once the kernel is flashed, you'll have the driver enabled on your device. Please let me know if you run into any issues.