Add stats64 support for ksz8xxx series of switches.
Signed-off-by: NOleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.kernel.org/r/20221205052904.2834962-1-o.rempel@pengutronix.deSigned-off-by: NJakub Kicinski <kuba@kernel.org>