dt-bindings: media: rockchip: Add resets property into decoder node

RK3588 AV1 decoder hardware block have resets lines and driver code
already support it.
Update yaml file to be aligned with this feature.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>