hwmon: (nzxt-kraken3) Bail out for unsupported device variants

Dan Carpenter reports:

Commit cbeb479f ("hwmon: (nzxt-kraken3) Decouple device names
from kinds") from Apr 28, 2024 (linux-next), leads to the following
Smatch static checker warning:

	drivers/hwmon/nzxt-kraken3.c:957 kraken3_probe()
	error: uninitialized symbol 'device_name'.

Indeed, 'device_name' will be uninitizalized if an unknown product is
encountered. In practice this should not matter because the driver
should not instantiate on unknown products, but lets play safe and
bail out if that happens.

Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/linux-hwmon/b1738c50-db42-40f0-a899-9c027c131ffb@moroto.mountain/


Cc: Jonas Malaco <jonas@protocubo.io>
Cc: Aleksa Savic <savicaleksa83@gmail.com>
Fixes: cbeb479f ("hwmon: (nzxt-kraken3) Decouple device names from kinds")
Acked-by: Jonas Malaco <jonas@protocubo.io>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>