dt-bindings: phy: ti,phy-j721e-wiz: drop assigned-clocks

The meta schema from DT schema already defines assigned-clocks, so there
is no need for device schema to mention it at all.  There are also no
benefits of having it here and a board could actually need more of clock
assignments than the schema allows.

Keep however the assigned-clocks in children nodes, as apparently their
proper parenting is required.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230404190115.546973-4-krzysztof.kozlowski@linaro.orgSigned-off-by: Vinod Koul <vkoul@kernel.org>

Documentation/devicetree/bindings/phy/ti,phy-j721e-wiz.yaml

@@ -54,18 +54,6 @@ properties:
 
   ranges: true
 
-  assigned-clocks:
-    minItems: 1
-    maxItems: 2
-
-  assigned-clock-parents:
-    minItems: 1
-    maxItems: 2
-
-  assigned-clock-rates:
-    minItems: 1
-    maxItems: 2
-
   typec-dir-gpios:
     maxItems: 1
     description: