timer: Replace with sdeventplus/timer

This is aimed at replacing the ad-hoc timer implementation contained in
each of our openbmc daemons, with a single well-tested timer
implementation.

Tested:
    Compiled

Change-Id: I3e562ab72820442aa137a2d517e476192ea6c1bd
Signed-off-by: William A. Kennington III <wak@google.com>
6 files changed