dt-bindings: i2c: i2c-fsi: Convert to json-schema

Convert to json-schema for the FSI-attached I2C controller.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Ninad Palsule <ninad@linux.ibm.com>
Link: https://lore.kernel.org/r/20240522192524.3286237-12-eajames@linux.ibm.com


Signed-off-by: Rob Herring (Arm) <robh@kernel.org>