Fixes the code-block example for K_EVENT_DEFINE() documentation
to show that it only takes one argument instead of three.
Signed-off-by: Peter Mitsis <peter.mitsis@intel.com>
Adds documentation for event objects. Events are posted to event
objects. Threads may wait on an event object for a specified set
of events.
Signed-off-by: Peter Mitsis <peter.mitsis@intel.com>