nfsd4: fix out of date comment

	struct list_head			so_stateids;

	struct list_head			so_stateids;

	struct nfs4_client			*so_client;

	struct nfs4_client			*so_client;

	const struct nfs4_stateowner_operations	*so_ops;

	const struct nfs4_stateowner_operations	*so_ops;

	/* after increment in ENCODE_SEQID_OP_TAIL, represents the next

	/* after increment in nfsd4_bump_seqid, represents the next

	 * sequence id expected from the client: */

	 * sequence id expected from the client: */

	atomic_t				so_count;

	atomic_t				so_count;

	u32					so_seqid;

	u32					so_seqid;