disable cpu isolcpus

hc

2023-12-09 958e46acc8e900e8569dd467c1af9b8d2d019394

 kernel/tools/testing/selftests/rcutorture/configs/rcu/SRCU-u.boot
..
..
@@ -1 +1,2 @@
1
1
 rcutorture.torture_type=srcud
2
+rcupdate.rcu_self_test=1