nfsd4: comment nitpick

Reported-by: "Madan, Anshul" <Anshul.Madan@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index ebbf3b6..e3611b5 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -605,7 +605,7 @@
 	return error;
 }
 
-#endif /* defined(CONFIG_NFS_V4) */
+#endif /* defined(CONFIG_NFSD_V4) */
 
 #ifdef CONFIG_NFSD_V3
 /*