atm: switch do_atm_iobuf() to direct use of atm_getnames()

static int do_atm_iobuf(struct socket *sock, unsigned int cmd,

			unsigned long arg)

{

	struct atm_iobuf __user *iobuf;

	struct compat_atm_iobuf __user *iobuf32;

	struct compat_atm_iobuf __user *iobuf32 = compat_ptr(arg);

	u32 data;

	void __user *datap;

	int len, err;

	iobuf = compat_alloc_user_space(sizeof(*iobuf));

	iobuf32 = compat_ptr(arg);

	if (get_user(len, &iobuf32->length) ||

	    get_user(data, &iobuf32->buffer))

		return -EFAULT;

	datap = compat_ptr(data);

	if (put_user(len, &iobuf->length) ||

	    put_user(datap, &iobuf->buffer))

	if (get_user(data, &iobuf32->buffer))

		return -EFAULT;

	err = do_vcc_ioctl(sock, cmd, (unsigned long) iobuf, 0);

	if (!err) {

		if (copy_in_user(&iobuf32->length, &iobuf->length,

				 sizeof(int)))

			err = -EFAULT;

	}

	return err;

	return atm_getnames(&iobuf32->length, compat_ptr(data));

}

static int do_atmif_sioc(struct socket *sock, unsigned int cmd,