dt-bindings: display: rockchip,dw-hdmi: add power-domains property

Most Rockchip hdmi nodes are part of a power domain.
Add a power-domains property and include it to the example
with some reordering to align with the (new) documentation
about property ordering.
Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/5c45527a-e218-40a3-8e71-a5815417e5f7@gmail.com

Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml

@@ -94,6 +94,9 @@ properties:
       - const: default
       - const: unwedge
 
+  power-domains:
+    maxItems: 1
+
   ports:
     $ref: /schemas/graph.yaml#/properties/ports
 
@@ -138,16 +141,18 @@ examples:
     #include <dt-bindings/clock/rk3288-cru.h>
     #include <dt-bindings/interrupt-controller/arm-gic.h>
     #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/power/rk3288-power.h>
 
     hdmi: hdmi@ff980000 {
         compatible = "rockchip,rk3288-dw-hdmi";
         reg = <0xff980000 0x20000>;
         reg-io-width = <4>;
-        ddc-i2c-bus = <&i2c5>;
-        rockchip,grf = <&grf>;
         interrupts = <GIC_SPI 103 IRQ_TYPE_LEVEL_HIGH>;
         clocks = <&cru  PCLK_HDMI_CTRL>, <&cru SCLK_HDMI_HDCP>;
         clock-names = "iahb", "isfr";
+        ddc-i2c-bus = <&i2c5>;
+        power-domains = <&power RK3288_PD_VIO>;
+        rockchip,grf = <&grf>;
 
         ports {
             #address-cells = <1>;