dt-bindings: i2c: qcom-cci: Document SM6350 compatible

Document the compatible for the CCI block found on SM6350 SoC.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>