nfs41: add a get_clid_cred function to nfs4_state_recovery_ops

EXCHANGE_ID has different credential requirements than SETCLIENTID.
Prepare for a separate credential function.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index e17bd44..90e5607 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -1102,7 +1102,7 @@
 		nfs4_reboot_recovery_ops[clp->cl_minorversion];
 	int status = -ENOENT;
 
-	cred = nfs4_get_setclientid_cred(clp);
+	cred = ops->get_clid_cred(clp);
 	if (cred != NULL) {
 		status = ops->establish_clid(clp, cred);
 		put_rpccred(cred);