[media] v4l2: get/set prio using video_dev prio structure
The v4l2_device structure embed a v4l2_prio_state structure used by default for priority handling, but drivers can override that default by setting the video_dev prio pointer to a different v4l2_prio_state instance. However, the VIDIO_G_PRIORITY and VIDIOC_S_PRIORITY implementations use the prio state embedded in v4l2_device unconditionally, breaking drivers that need to override the default. Fix them. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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