ARM: configs: enable support for Kontron KSwitch D10

The Kontron KSwitch D10 is based on a Microchip LAN9668 SoC. It is a
managed ethernet network switch with either 8 copper ports or 6 copper
ports and 2 SFP cages.

Enable all required kconfig symbols, either as module where possible or
compiled-in where it is not possible.

Signed-off-by: Michael Walle <michael@walle.cc>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20220518141542.531148-1-michael@walle.cc

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Signed-off-by: Arnd Bergmann <arnd@arndb.de>