dt-bindings: trivial-devices: Add hitron,hac300s

Add HiTRON HAC300S PSU to trivial devices since it is simple PMBUS
capable device.

Since this is the first supported device from this vendor, document its
name to the vendor-prefixes.yaml file as well.

Signed-off-by: Vasileios Amoiridis <vasileios.amoiridis@cern.ch>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260119190806.35276-2-vassilisamir@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Author: Vasileios Amoiridis

Documentation/devicetree/bindings/trivial-devices.yaml

@@ -123,6 +123,8 @@ properties:
           - fsl,mma8450
             # MPR121: Proximity Capacitive Touch Sensor Controller
           - fsl,mpr121
+            # HiTRON AC/DC CompactPCI Power Supply
+          - hitron,hac300s
             # Honeywell Humidicon HIH-6130 humidity/temperature sensor
           - honeywell,hi6130
             # IBM Common Form Factor Power Supply Versions (all versions)

Documentation/devicetree/bindings/vendor-prefixes.yaml

@@ -701,6 +701,8 @@ patternProperties:
     description: Hitachi Ltd.
   "^hitex,.*":
     description: Hitex Development Tools
+  "^hitron,.*":
+    description: HiTRON Electronics Corporation
   "^holt,.*":
     description: Holt Integrated Circuits, Inc.
   "^holtek,.*":