media: amphion: Cancel message work before releasing the VPU core

media: amphion: Cancel message work before releasing the VPU core

commit ae246b0032146e352c4c06a7bf03cd3d5bcb2ecd upstream.

To avoid accessing the VPU register after release of the VPU core,
cancel the message work and destroy the workqueue that handles the
VPU message before release of the VPU core.

Fixes: 3cd084519c6f ("media: amphion: add vpu v4l2 m2m support")
Cc: stable@vger.kernel.org
Signed-off-by: Ming Qian <ming.qian@oss.nxp.com>
Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>