media: imx: capture: Clean up capture_priv structure

#define IMX_CAPTURE_NAME "imx-capture"

struct capture_priv {

	struct imx_media_video_dev vdev;

	struct imx_media_dev *md;		/* Media device */

	struct device *dev;			/* Physical device */

	struct v4l2_subdev    *src_sd;

	int                   src_sd_pad;

	struct device         *dev;

	struct imx_media_video_dev vdev;	/* Video device */

	struct media_pad vdev_pad;		/* Video device pad */

	struct imx_media_dev  *md;

	struct v4l2_subdev *src_sd;		/* Source subdev */

	int src_sd_pad;				/* Source subdev pad */

	struct media_pad      vdev_pad;

	struct mutex mutex;			/* Protect vdev operations */

	struct mutex          mutex;       /* capture device mutex */

	struct vb2_queue q;			/* The videobuf2 queue */

	struct list_head ready_q;		/* List of queued buffers */

	spinlock_t q_lock;			/* Protect ready_q */

	/* the videobuf2 queue */

	struct vb2_queue       q;

	/* list of ready imx_media_buffer's from q */

	struct list_head       ready_q;

	/* protect ready_q */

	spinlock_t             q_lock;

	struct v4l2_ctrl_handler ctrl_hdlr;	/* Controls inherited from subdevs */

	/* controls inherited from subdevs */

	struct v4l2_ctrl_handler ctrl_hdlr;

	/* misc status */

	bool stop;				/* streaming is stopping */

};