dt-bindings: hwmon: max31790: Use addressed fan nodes

Since fan properties can include reg, the fan controller should be
able to specify address-cells and size-cells properties and use
an addressed fan child node.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20251001144441.310950-6-eajames@linux.ibm.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Documentation/devicetree/bindings/hwmon/maxim,max31790.yaml

@@ -35,11 +35,17 @@ properties:
   resets:
     maxItems: 1
 
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 0
+
   "#pwm-cells":
     const: 1
 
 patternProperties:
-  "^fan-[0-9]+$":
+  "^fan@[0-9]+$":
     $ref: fan-common.yaml#
     unevaluatedProperties: false
 
@@ -60,13 +66,17 @@ examples:
         reg = <0x20>;
         clocks = <&sys_clk>;
         resets = <&reset 0>;
+        #address-cells = <1>;
         #pwm-cells = <1>;
+        #size-cells = <0>;
 
-        fan-0 {
+        fan@0 {
+          reg = <0x0>;
           pwms = <&pwm_provider 1>;
         };
 
-        fan-1 {
+        fan@1 {
+          reg = <0x1>;
           pwms = <&pwm_provider 2>;
         };
       };