ethtool: Update to version 6.3

ethtool: Update to version 6.3

- Update from version 6.2 to 6.3
- Update of rootfile not required
- Changelog
Version 6.3 - May 8, 2023
	* Feature: PLCA support (--[gs]et-plca-cfg, --get-plca-status)
	* Feature: MAC Merge layer support (--show-mm, --set-mm)
	* Feature: pass source of statistics for port stats
	* Feature: get/set rx push in ringparams (-g and -G)
	* Feature: coalesce tx aggregation parameters (-c and -C)
	* Feature: PSE and PD devices (--show-pse, --set-pse)
	* Fix: minor fixes of help text (--help)
	* Fix: fix build on systems with older system headers
	* Fix: fix netlink support when PLCA is not present (no option)
	* Fix: fixes for issues found with gcc13 -fanalyzer
	* Fix: fix return code in rxclass_rule_ins (-N)
	* Fix: more robust argc/argv handling

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>