media: amphion: cancel vpu before release instance

Revert "media: amphion: release m2m ctx when releasing vpu instance"
This reverts commit d91d7bc8.

Call v4l2_m2m_ctx_release() to cancel vpu,
afterwards release the vpu instance.

Fixes: d91d7bc8 ("media: amphion: release m2m ctx when releasing vpu instance")
Signed-off-by: Ming Qian <ming.qian@nxp.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>