hwmon: (f71882fg) Add support for the F71862FG superio sensors

This patch adds support for the Fintek f71862fg superio monitoring
functions to the f71882fg driver.

This support has been tested without problems on a Jetway J9F2 by
Tony McConnell.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>