Change it from "Acer Chromebook 13" to GoogleNyanBig so it's unique and
identifiable.

With this change the card id exposed to userspace becomes GoogleNyanBig
instead of the current A13.
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>