[media] ov772x: try_fmt must not default to the current format

static int ov772x_try_fmt(struct v4l2_subdev *sd,

			  struct v4l2_mbus_framefmt *mf)

{

	struct ov772x_priv *priv = container_of(sd, struct ov772x_priv, subdev);

	const struct ov772x_color_format *cfmt;

	const struct ov772x_win_size *win;

	int i;

	/*

	 * select suitable win

	 */

	win = ov772x_select_win(mf->width, mf->height);

	ov772x_select_params(mf, &cfmt, &win);

	mf->code = cfmt->code;

	mf->width = win->width;

	mf->height = win->height;

	mf->field = V4L2_FIELD_NONE;

	for (i = 0; i < ARRAY_SIZE(ov772x_cfmts); i++)

		if (mf->code == ov772x_cfmts[i].code)

			break;

	if (i == ARRAY_SIZE(ov772x_cfmts)) {

		/* Unsupported format requested. Propose either */

		if (priv->cfmt) {

			/* the current one or */

			mf->colorspace = priv->cfmt->colorspace;

			mf->code = priv->cfmt->code;

		} else {

			/* the default one */

			mf->colorspace = ov772x_cfmts[0].colorspace;

			mf->code = ov772x_cfmts[0].code;

		}

	} else {

		/* Also return the colorspace */

		mf->colorspace	= ov772x_cfmts[i].colorspace;

	}

	mf->colorspace = cfmt->colorspace;

	return 0;

}