Add firmware activation messages to the registry

In some situations a firmware requires activation rather than
update.  These messages are intended to cover those situations.

Tested:
Logged these events and confirmed that they appear correctly in
Redfish.

Change-Id: I6171b9584626e049349a26c414146f37c04768c7
Signed-off-by: Jason M. Bills <jason.m.bills@linux.intel.com>