dt-bindings: hwmon: as370: convert to dtschema

Convert existing binding to support validation.

This is a straightforward conversion with now new properties.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Link: https://lore.kernel.org/r/20240322-hwmon_dtschema-v3-1-6697de2a8228@gmail.com


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