ntsync: convert ntsync_obj_get_fd() to FD_PREPARE()

static int ntsync_obj_get_fd(struct ntsync_obj *obj)

{

	struct file *file;

	int fd;

	fd = get_unused_fd_flags(O_CLOEXEC);

	if (fd < 0)

		return fd;

	file = anon_inode_getfile("ntsync", &ntsync_obj_fops, obj, O_RDWR);

	if (IS_ERR(file)) {

		put_unused_fd(fd);

		return PTR_ERR(file);

	}

	obj->file = file;

	fd_install(fd, file);

	return fd;

	FD_PREPARE(fdf, O_CLOEXEC,

		   anon_inode_getfile("ntsync", &ntsync_obj_fops, obj, O_RDWR));

	if (fdf.err)

		return fdf.err;

	obj->file = fd_prepare_file(fdf);

	return fd_publish(fdf);

}

static int ntsync_create_sem(struct ntsync_device *dev, void __user *argp)