hwmon: (pmbus/adm1275) add adm1273 support

Add support for adm1273 which is similar to adm1275 and other chips
of the series.

Signed-off-by: John Erasmus Mari Geronimo <johnerasmusmari.geronimo@analog.com>
Link: https://lore.kernel.org/r/20250106131740.305988-3-johnerasmusmari.geronimo@analog.com


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