dt-bindings: phy: hisilicon,hi3660-usb3: simplify example

syscon and simple-mfd cannot be used without device specific compatible,
so simplify the example to fix this.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-By: Vinod Koul <vkoul@kernel.org>
Acked-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Link: https://lore.kernel.org/r/20220817142246.828762-2-krzysztof.kozlowski@linaro.orgSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/phy/hisilicon,hi3660-usb3.yaml

@@ -41,20 +41,10 @@ additionalProperties: false
 
 examples:
   - |
-    bus {
-      #address-cells = <2>;
-      #size-cells = <2>;
-
-      usb3_otg_bc: usb3_otg_bc@ff200000 {
-        compatible = "syscon", "simple-mfd";
-        reg = <0x0 0xff200000 0x0 0x1000>;
-
-        usb-phy {
-          compatible = "hisilicon,hi3660-usb-phy";
-          #phy-cells = <0>;
-          hisilicon,pericrg-syscon = <&crg_ctrl>;
-          hisilicon,pctrl-syscon = <&pctrl>;
-          hisilicon,eye-diagram-param = <0x22466e4>;
-        };
-      };
+    usb-phy {
+        compatible = "hisilicon,hi3660-usb-phy";
+        #phy-cells = <0>;
+        hisilicon,pericrg-syscon = <&crg_ctrl>;
+        hisilicon,pctrl-syscon = <&pctrl>;
+        hisilicon,eye-diagram-param = <0x22466e4>;
     };