A0 stepping chips need to use manual training, but the bits have all
moved.  So fix things up so we can at least train FDI for VGA links.
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: NKeith Packard <keithp@keithp.com>
Signed-off-by: NKeith Packard <keithp@keithp.com>