dt-bindings: net: phy: add PoDL PSE property

Add property to reference node representing a PoDL Power Sourcing Equipment.
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Documentation/devicetree/bindings/net/ethernet-phy.yaml

@@ -144,6 +144,12 @@ properties:
       Mark the corresponding energy efficient ethernet mode as
       broken and request the ethernet to stop advertising it.
 
+  pses:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    maxItems: 1
+    description:
+      Specifies a reference to a node representing a Power Sourcing Equipment.
+
   phy-is-integrated:
     $ref: /schemas/types.yaml#/definitions/flag
     description: