dt-bindings: net: dsa: document additional Microchip KSZ8863/8873 switch

It is a 3-Port 10/100 Ethernet Switch. One CPU-Port and two
Switch-Ports.

Cc: devicetree@vger.kernel.org
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Acked-by: NRob Herring <robh@kernel.org>
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NMichael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: NOleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml

@@ -21,6 +21,8 @@ properties:
       - microchip,ksz8765
       - microchip,ksz8794
       - microchip,ksz8795
+      - microchip,ksz8863
+      - microchip,ksz8873
       - microchip,ksz9477
       - microchip,ksz9897
       - microchip,ksz9896