dt-bindings: hwmon: ibm,p8-occ-hwmon: move to trivial devices

This binding meets the requirements to be converted to dtschema
via trivial-devices.yaml.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Link: https://lore.kernel.org/r/20240322-hwmon_dtschema-v3-5-6697de2a8228@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Documentation/devicetree/bindings/hwmon/ibm,p8-occ-hwmon.txt

@@ -1,25 +0,0 @@
-Device-tree bindings for I2C-based On-Chip Controller hwmon device
-------------------------------------------------------------------
-
-Required properties:
- - compatible = "ibm,p8-occ-hwmon";
- - reg = <I2C address>;			: I2C bus address
-
-Examples:
-
-    i2c-bus@100 {
-        #address-cells = <1>;
-        #size-cells = <0>;
-        clock-frequency = <100000>;
-        < more properties >
-
-        occ-hwmon@1 {
-            compatible = "ibm,p8-occ-hwmon";
-            reg = <0x50>;
-        };
-
-        occ-hwmon@2 {
-            compatible = "ibm,p8-occ-hwmon";
-            reg = <0x51>;
-        };
-    };

Documentation/devicetree/bindings/trivial-devices.yaml

@@ -126,6 +126,8 @@ properties:
           - ibm,cffps1
             # IBM Common Form Factor Power Supply Versions 2
           - ibm,cffps2
+            # IBM On-Chip Controller hwmon device
+          - ibm,p8-occ-hwmon
             # Infineon barometric pressure and temperature sensor
           - infineon,dps310
             # Infineon IR36021 digital POL buck controller