[media] v4l2-dev: add new VFL_DIR_ defines

#define VFL_TYPE_SUBDEV		3

#define VFL_TYPE_MAX		4

/* Is this a receiver, transmitter or mem-to-mem? */

/* Ignored for VFL_TYPE_SUBDEV. */

#define VFL_DIR_RX		0

#define VFL_DIR_TX		1

#define VFL_DIR_M2M		2

struct v4l2_ioctl_callbacks;

struct video_device;

struct v4l2_device;

	/* device info */

	char name[32];

	int vfl_type;

	int vfl_type;	/* device type */

	int vfl_dir;	/* receiver, transmitter or m2m */

	/* 'minor' is set to -1 if the registration failed */

	int minor;

	u16 num;