witherspoon: Add fan speed inc/dec control based on core temps

Set speed events now support the use of preconditions, a speed increase
action, and a speed decrease action to allow OCC provided core temps to
adjust fan speeds. This enables automatic fan control based only on core
temps when both OCCs are active.

Resolves openbmc/openbmc#1792

Change-Id: Iad924773f8b71382032f237977185619ecb03ecd
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
1 file changed