ethtool: Update to version 5.16

ethtool: Update to version 5.16

- Update from 5.15 to 5.16
- Update of rootfile not required
- Changelog
   Version 5.16 - January 19, 2022
	* Feature: use memory maps for module EEPROM parsing (-m)
	* Feature: show CMIS diagnostic information (-m)
	* Fix: fix dumping advertised FEC modes (--show-fec)
	* Fix: ignore cable test notifications from other devices (--cable-test)
	* Fix: do not show duplicate options in help text (--help)

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Reviewed-by: Peter Müller <peter.mueller@ipfire.org>