dt-bindings: i2c: qcom,i2c-cci: Document MSM8226 compatible

MSM8226's Camera Control Interface has one master and 3 clocks.

Signed-off-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>