dt-bindings: mfd: ocelot: add ethernet-switch hardware support

The main purpose of the Ocelot chips are the Ethernet switching
functionalities. Document the support for these features.

Signed-off-by: Colin Foster <colin.foster@in-advantage.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Tested-by: Vladimir Oltean <vladimir.oltean@nxp.com> # regression
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Documentation/devicetree/bindings/mfd/mscc,ocelot.yaml

@@ -57,6 +57,15 @@ patternProperties:
         enum:
           - mscc,ocelot-miim
 
+  "^ethernet-switch@[0-9a-f]+$":
+    type: object
+    $ref: /schemas/net/mscc,vsc7514-switch.yaml
+    unevaluatedProperties: false
+    properties:
+      compatible:
+        enum:
+          - mscc,vsc7512-switch
+
 required:
   - compatible
   - reg