dt-bindings: i2c: qcom,i2c-cci: specify SM8450 CCI clocks

Document clocks for SM8450 Camera Control Interface I2C controller.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>