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 <[e-mail]>
Reviewed-by: Rob Herring (Arm) <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Guenter Roeck <[e-mail]>

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

···
   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
 
···
         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>;
         };
       };