Version downgrades (or what appear to be downgrades) do occasionally
happen, and if they did then the RRS was previously simply ignoring
them, resulting in the latest version being reported incorrectly.
Allow downgrades to be recorded as an upgrade with a new 'Downgrade'
type option set, and display a label on such records in the UI.
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
