hwmon: (lm90) Add compatible entry for adt7481

This will allow binding the driver with the device from the device tree.

Signed-off-by: Slawomir Stepien <slawomir.stepien@nokia.com>
Link: https://lore.kernel.org/r/20220525073657.573327-4-sst@poczta.fm


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