hwmon: (adm1021) Fix cache problem when writing temperature limits

commit c024044d4da2c9c3b32933b4235df1e409293b84 upstream.

The module test script for the adm1021 driver exposes a cache problem
when writing temperature limits. temp_min and temp_max are expected
to be stored in milli-degrees C but are stored in degrees C.

Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>