pnfs: Add nfs_rpc_ops in calls to nfs_initiate_pgio

Signed-off-by: Tom Haynes <loghyr@primarydata.com>

include/linux/nfs_page.h

@@ -69,6 +69,7 @@ struct nfs_rw_ops {
 			struct inode *);
 	void (*rw_result)(struct rpc_task *, struct nfs_pgio_header *);
 	void (*rw_initiate)(struct nfs_pgio_header *, struct rpc_message *,
+			    const struct nfs_rpc_ops *,
 			    struct rpc_task_setup *, int);
 };