wspoon: Configure zone thermal mode properties

Populate the properties on the Control.ThermalMode interface with the
list of supported modes along with setting the default value of the
current mode.

With setting these modes to uppercase, the events must also be updated
to match to effectively load process the event using this property.

Tested:
    Introspected the zone object and verified the values of each
property when fan control initializes the zone.

Requires:
    https://gerrit.openbmc-project.xyz/18474

Change-Id: I9a7743891e7eaa62e3ebc4b5e08cfa6defca88c5
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
2 files changed