media: verisilicon: Add AV1 decoder mode and controls

Add AV1 decoder as new decoder mode to Hantro driver.
Register needed AV1 controls for the decoder.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>