nfsd4: drop most stateowner refcounting

Maybe we'll bring it back some day, but we don't have much real use for
it now.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h
index 341f0a1..de236fb 100644
--- a/fs/nfsd/xdr4.h
+++ b/fs/nfsd/xdr4.h
@@ -130,7 +130,7 @@
 
 struct nfsd4_lock_denied {
 	clientid_t	ld_clientid;
-	struct nfs4_stateowner   *ld_sop;
+	struct xdr_netobj	ld_owner;
 	u64             ld_start;
 	u64             ld_length;
 	u32             ld_type;