dt-bindings: trivial-devices: add isil,isl69269

The ISL69269 is a PMBus voltage regulator with no configurable
parameters.
Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240502002836.17862-6-zev@bewilderbeest.netSigned-off-by: Joel Stanley <joel@jms.id.au>

Documentation/devicetree/bindings/trivial-devices.yaml

@@ -160,6 +160,8 @@ properties:
           - isil,isl29030
             # Intersil ISL68137 Digital Output Configurable PWM Controller
           - isil,isl68137
+            # Intersil ISL69269 PMBus Voltage Regulator
+          - isil,isl69269
             # Intersil ISL76682 Ambient Light Sensor
           - isil,isl76682
             # Linear Technology LTC2488