We've tried several times to make this machine 'just work', but every
patch that does causes many other machines to fail. This adds a quirk
which special cases this hardware and forces ssc to be
disabled. There's no way to override this from the command line; that
would be a significantly more invasive change.

This patch fixes #36656 on fdo bugzilla:
https://bugs.freedesktop.org/show_bug.cgi?id=36656Signed-off-by: Keith Packard <keithp@keithp.com>
References: https://bugs.freedesktop.org/show_bug.cgi?id=36656Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>