dt-bindings: power: rockchip: Document RV1126 PMU IO domains

Document dt-bindings for RV1126 PMU IO domains.
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Jagan Teki <jagan@edgeble.ai>
Link: https://lore.kernel.org/r/20220818124132.125304-5-jagan@edgeble.aiSigned-off-by: Heiko Stuebner <heiko@sntech.de>

Documentation/devicetree/bindings/power/rockchip-io-domain.yaml

@@ -58,6 +58,7 @@ properties:
       - rockchip,rk3568-pmu-io-voltage-domain
       - rockchip,rv1108-io-voltage-domain
       - rockchip,rv1108-pmu-io-voltage-domain
+      - rockchip,rv1126-pmu-io-voltage-domain
 
 required:
   - compatible
@@ -78,6 +79,7 @@ allOf:
   - $ref: "#/$defs/rk3568-pmu"
   - $ref: "#/$defs/rv1108"
   - $ref: "#/$defs/rv1108-pmu"
+  - $ref: "#/$defs/rv1126-pmu"
 
 $defs:
   px30:
@@ -344,6 +346,34 @@ $defs:
         pmu-supply:
           description: The supply connected to PMUIO_VDD.
 
+  rv1126-pmu:
+    if:
+      properties:
+        compatible:
+          contains:
+            const: rockchip,rv1126-pmu-io-voltage-domain
+
+    then:
+      properties:
+        vccio1-supply:
+          description: The supply connected to VCCIO1.
+        vccio2-supply:
+          description: The supply connected to VCCIO2.
+        vccio3-supply:
+          description: The supply connected to VCCIO3.
+        vccio4-supply:
+          description: The supply connected to VCCIO4.
+        vccio5-supply:
+          description: The supply connected to VCCIO5.
+        vccio6-supply:
+          description: The supply connected to VCCIO6.
+        vccio7-supply:
+          description: The supply connected to VCCIO7.
+        pmuio0-supply:
+          description: The supply connected to PMUIO0.
+        pmuio1-supply:
+          description: The supply connected to PMUIO1.
+
 examples:
   - |
     io-domains {