dt-bindings: hwmon: ina3221: Convert to json-schema

Convert the TI INA3221 bindings from the free-form text format to
json-schema.

Note that the INA3221 input channels default to enabled in the chip.
Unless channels are explicitly disabled in device-tree, input
channels will be enabled.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Ninad Malwade <nmalwade@nvidia.com>
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230929103650.86074-2-jonathanh@nvidia.com


Signed-off-by: Guenter Roeck <linux@roeck-us.net>