dt-bindings: net: pse-pd: microchip,pd692x0: Add manager regulator supply

Adds the regulator supply parameter of the managers.
Update also the example as the regulator supply of the PSE PIs
should be the managers itself and not an external regulator.

Signed-off-by: Kory Maincent (Dent Project) <[e-mail]>
Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

Documentation/devicetree/bindings/net/pse-pd/microchip,pd692x0.yaml

···
   reg:
     maxItems: 1
 
+  vdd-supply:
+    description: Regulator that provides 3.3V VDD power supply.
+
+  vdda-supply:
+    description: Regulator that provides 3.3V VDDA power supply.
+
   managers:
     type: object
     additionalProperties: false
···
           "#size-cells":
             const: 0
 
+          vmain-supply:
+            description: Regulator that provides 44-57V VMAIN power supply.
+
+          vaux5-supply:
+            description: Regulator that provides 5V VAUX5 power supply.
+
+          vaux3p3-supply:
+            description: Regulator that provides 3.3V VAUX3P3 power supply.
+
         patternProperties:
           '^port@[0-7]$':
             type: object
···
           #address-cells = <1>;
           #size-cells = <0>;
 
-          manager@0 {
+          manager0: manager@0 {
             reg = <0>;
             #address-cells = <1>;
             #size-cells = <0>;
+            vmain-supply = <&pse1_supply>;
 
             phys0: port@0 {
               reg = <0>;
···
             pairset-names = "alternative-a", "alternative-b";
             pairsets = <&phys0>, <&phys1>;
             polarity-supported = "MDI", "S";
-            vpwr-supply = <&vpwr1>;
+            vpwr-supply = <&manager0>;
           };
           pse_pi1: pse-pi@1 {
             reg = <1>;
···
             pairset-names = "alternative-a";
             pairsets = <&phys2>;
             polarity-supported = "MDI";
-            vpwr-supply = <&vpwr2>;
+            vpwr-supply = <&manager0>;
           };
         };
       };