Set sensor initial value.
Set sensor initial value.

Set the initial value of the value property in the
Sensor.Value interface.

Change-Id: I1324d3172d1f69cf90f59a065327ab8f739243ed
Signed-off-by: Brad Bishop <713d098c0be4c8fd2bf36a94cd08699466677ecd@fuzziesquirrel.com>

openbmc/phosphor-hwmon,openbmc/phosphor-hwmon