dt-bindings: net: realtek,rtl9301-mdio: Add RTL931x series

The 10G Realtek Otto switches are divided into two series

- Longan: RTL930x up to 28 ports
- Mango : RTL931x up to 56 ports

The Mango based devices have 3 different SoCs RTL9311, RTL9312 and RTL9313.
The MDIO controller of these switches works like the existing RTL930x
logic but has different characteristics and different registers. Add new
compatibles in the device tree.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Link: https://patch.msgid.link/20260610194145.4153668-2-markus.stockhausen@gmx.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Documentation/devicetree/bindings/net/realtek,rtl9301-mdio.yaml

@@ -18,7 +18,14 @@ properties:
               - realtek,rtl9302c-mdio
               - realtek,rtl9303-mdio
           - const: realtek,rtl9301-mdio
-      - const: realtek,rtl9301-mdio
+      - items:
+          - enum:
+              - realtek,rtl9312-mdio
+              - realtek,rtl9313-mdio
+          - const: realtek,rtl9311-mdio
+      - enum:
+          - realtek,rtl9301-mdio
+          - realtek,rtl9311-mdio
 
   '#address-cells':
     const: 1