dt-bindings: clock: use generic node name for pmucru example in rockchip,rk3399-cru.yaml

The node names should be generic, so fix this for the pmucru node example
in the rockchip,rk3399-cru.yaml file and rename it to "clock-controller".

Signed-off-by: Johan Jonker <[e-mail]>
Acked-by: Krzysztof Kozlowski <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Heiko Stuebner <[e-mail]>

Documentation/devicetree/bindings/clock/rockchip,rk3399-cru.yaml

···
 
 examples:
   - |
-    pmucru: pmu-clock-controller@ff750000 {
+    pmucru: clock-controller@ff750000 {
       compatible = "rockchip,rk3399-pmucru";
       reg = <0xff750000 0x1000>;
       #clock-cells = <1>;