Resolve fan errors when they become functional

Add Witherspoon dbus-monitor rules to watch for fans becoming
functional, which will invoke the callback that resolves all errors
that called out that fan.

This will cause the fault LEDs to turn off when the fan
is replaced and spins back up to speed.

Resolves openbmc/openbmc#2513

Change-Id: I7f787854915ca2bb1b66508b343eaa137cede6fd
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
1 file changed