dt-bindings: net: renesas: Drop ethernet-phy node schema

What's connected on the MDIO bus is outside the scope of the binding for
ethernet controller's MDIO bus unless it's a fixed internal device, so
drop the node name and reference to ethernet-phy.yaml.
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20231016-dt-net-cleanups-v1-2-a525a090b444@kernel.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Documentation/devicetree/bindings/net/renesas,ether.yaml

@@ -81,9 +81,8 @@ properties:
       active-high
 
 patternProperties:
-  "^ethernet-phy@[0-9a-f]$":
+  "@[0-9a-f]$":
     type: object
-    $ref: ethernet-phy.yaml#
 
 required:
   - compatible

Documentation/devicetree/bindings/net/renesas,etheravb.yaml

@@ -109,9 +109,8 @@ properties:
     enum: [0, 2000]
 
 patternProperties:
-  "^ethernet-phy@[0-9a-f]$":
+  "@[0-9a-f]$":
     type: object
-    $ref: ethernet-phy.yaml#
 
 required:
   - compatible