dt-bindings: power: supply: axp20x: Add AXP192 compatible

The AXP192 is most similar to the AXP202, but the current
limits are different and the USB OTG status register has
a different address (0x04 instead of 0x02).
Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@gmail.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

Documentation/devicetree/bindings/power/supply/x-powers,axp20x-usb-power-supply.yaml

@@ -22,6 +22,7 @@ properties:
   compatible:
     oneOf:
       - enum:
+          - x-powers,axp192-usb-power-supply
           - x-powers,axp202-usb-power-supply
           - x-powers,axp221-usb-power-supply
           - x-powers,axp223-usb-power-supply