net: dsa: microchip: Use different registers for KSZ8463

KSZ8463 does not use same set of registers as KSZ8863 so it is necessary
to change some registers when using KSZ8463.

Signed-off-by: Tristram Ha <tristram.ha@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20250725001753.6330-4-Tristram.Ha@microchip.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>