hwmon: (adt7470) Convert to devm_hwmon_device_register_with_info API

Use the devm_hwmon_device_register_with_info API and remove code that
deals with the standard sensor attributes.

Signed-off-by: Chris Packham <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[groeck: Fixed alignment issues]
Signed-off-by: Guenter Roeck <[email protected]>

Author: cpackham-atlnz