hwmon: (lineage-pem): Fix in1 voltage alarm sysfs attributes

The alarm bit assumed to be a low voltage alarm bit is not set for low voltage
alarms, and the alarm bit assumed to be a high voltage alarm turns out to be a
general alarm bit which is set for both low and high voltage alarms.

Remove the in1_min_alarm sysfs attribute and rename in1_max_alarm to in1_alarm
to reflect the situation.

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Acked-by: Jean Delvare <khali@linux-fr.org>