intel22x: update driver from FreeBSD sources

Fixes #18187

Change-Id: If0c281ce2eaf8a27d97c3211f8156d6d373e9256
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5983
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

network/ether: Import igc from FreeBSD as "intel22x".

This is the driver for Intel's new line of desktop-class ethernet
controllers, from FreeBSD. Not yet included in the builds as it
is untested.

Part of #17212.