dt-bindings: i2c: arb-gpio-challange: convert to DT schema

Convert the bindings for GPIO-based I2C Arbitration Using a Challenge &
Response Mechanism to DT schema.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20230731163833.319258-2-krzysztof.kozlowski@linaro.org


Signed-off-by: Andi Shyti <andi.shyti@kernel.org>