dt-bindings: iio: imu: Add Bosch BMI323

Add devicetree description document for Bosch BMI323, a 6-Axis IMU.

Signed-off-by: Jagath Jog J <jagathjog1996@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20231013034808.8948-2-jagathjog1996@gmail.com


Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>