ipro1000: Upgrade to FreeBSD 13.1.

Includes support for new I219 device families.

Taken from the 13.1 releng branch (currently on "beta 2" status.)
Tested in QEMU and VMware. The "e1000" device works OK in QEMU,
"e1000e" does not anymore, but reportedly the FreeBSD devs say
it does on bare metal, so this is probably a QEMU bug (it doesn't
seem to be a commonly used device.)