control:p10bmc: Create 2s fan control timer loop event

Add the fan control timer loop, initially collecting the OCC provided
temperatures, that runs every 2 seconds. All temperature sensors
utilized in determining fan speed increases/decreases will be added to
this event. Future commits will add the fan speed increase/decrease
actions per group to this event that will be run after all groups are
collected from dbus.

Change-Id: I5540b9bcbf7d4c853277e674a7ed900acfab8364
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
4 files changed