moveconfig: Only show output when there is a reason

There is no point in listing a board if everything went well. It makes it
harder to see the failures, particularly on a fast machine.

Suppress output unless something actually happened.

Drop the 'Syncing by savedefconfig' since this is selected by the -s and
is the same for all boards in this mode.

Signed-off-by: Simon Glass <sjg@chromium.org>