sched/fair: fix kabi broken due to adding idle_h_nr_running in cfs_rq

hulk inclusion
category: bugfix
bugzilla: 38260, https://bugzilla.openeuler.org/show_bug.cgi?id=22


CVE: NA

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Commit 92010bb6d6b8 ("sched/fair: Start tracking SCHED_IDLE tasks count in cfs_rq")
introduced kabi broken, just fix it.

Fixes: 92010bb6d6b8 ("sched/fair: Start tracking SCHED_IDLE tasks count in cfs_rq")
Signed-off-by: Cheng Jian <cj.chengjian@huawei.com>
Reviewed-by: Xie XiuQi <xiexiuqi@huawei.com>