Kernel fails to build with CONFIG_HZ_PERIODIC

The kernel fails to build with CONFIG_HZ_PERIODIC. It seems that ECHO expects CONFIG_NO_HZ_COMMON: `kernel/sched/bs.c:879:30: error: use of undeclared identifier 'run_rebalance_domains' 879 | open_softirq(SCHED_SOFTIRQ, run_rebalance_domains); | ^` This is easily fixed by making CONFIG_ECHO_SCHED depend on CONFIG_NO_HZ_COMMON.