hwmon: (raspberrypi) Exit immediately in case of error in init

Exit immediately if devm_hwmon_device_register_with_info()
fails since registering a delayed work whould be useless
in such a case anyway.

Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20211211184449.18211-1-W_Armin@gmx.de


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