Define op_iattr for nfsd4_open instead using macro

	u32		op_create;     	    /* request */

	u32		op_createmode;      /* request */

	u32		op_bmval[3];        /* request */

	struct iattr	iattr;              /* UNCHECKED4, GUARDED4, EXCLUSIVE4_1 */

	struct iattr	op_iattr;           /* UNCHECKED4, GUARDED4, EXCLUSIVE4_1 */

	nfs4_verifier	op_verf __attribute__((aligned(32)));

					    /* EXCLUSIVE4 */

	clientid_t	op_clientid;        /* request */

	struct nfs4_acl *op_acl;

	struct xdr_netobj op_label;

};

#define op_iattr	iattr

struct nfsd4_open_confirm {

	stateid_t	oc_req_stateid		/* request */;