dt-bindings: hwmon: pmbus: Add bindings for Vicor pli1209bc

dt-bindings: hwmon: pmbus: Add bindings for Vicor pli1209bc

Remove vicor,pli1209bc from trivial-devices as it requires additional
properties and does not fit into the trivial devices category.

Add new bindings for Vicor pli1209bc, a Digital Supervisor with
Isolation for use with BCM Bus Converter Modules.

VR rails are defined under regulator node as expected by pmbus driver.

Signed-off-by: Naresh Solanki <naresh.solanki@9elements.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Message-ID: <20241021123044.3648960-1-naresh.solanki@9elements.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>