nfsd4: update comments with obsolete function name

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 5a9588e..a07d98c 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -1538,7 +1538,7 @@
 }
 
 /*
- * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
+ * Cache a reply. nfsd4_check_resp_size() has bounded the cache size.
  */
 void
 nfsd4_store_cache_entry(struct nfsd4_compoundres *resp)