meson: Add panfrost to the --auto list

Look ma, we're a real driver now! I was waiting until Panfrost
stabilises a bit for this, but now that 19.2 is almost here, let's make
us official :)

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Eric Engestrom <eric@engestrom.ch>
1 file changed