hwmon: (f71882fg) Use strict_stro(l|ul) instead of simple_strto$1

Use the strict_strol and strict_stroul functions instead of simple_strol
and simple_stroul respectively in sysfs functions.

Signed-off-by: Giel van Schijndel <me@mortis.eu>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>