Driver for 4x10Gb Ethernet reference NIC FPGA design for NetFPGA SUME
development board.

Submitted by: Denis Salopek <denis.salopek AT fer.hr>
Reported by: zec, bz (src); rgrimes, bcr (manpages)
MFC after: 7 days
Sponsored by: Google Summer of Code 2020
Differential Revision: https://reviews.freebsd.org/D26074