hwmon: (dell-smm) Move whitelist handling to module init

hwmon: (dell-smm) Move whitelist handling to module init

Future SMM calling backends will not be able to probe during
module init, meaning the DMI tables used for whitelisting
features would have to drop their __initconst attribute.
Prevent this by moving the whitelist handling to module init.

Tested-by: <serverror@serverror.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20231123004820.50635-4-W_Armin@gmx.de
Signed-off-by: Guenter Roeck <linux@roeck-us.net>