smart_grid: cpufreq: clear offline and isolated CPU in warm CPUs

hulk inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8MFO6


CVE: NA

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When there has some CPU has been offline or isolated, the warm zone
CPUs will not clear these CPUs.

Because of the warm zone were saluted by a complement of hot zone.

So, we need to clear offline and isolated CPUs in every time's warm
zone CPUs update.

Fixes: 6a008918 ("smart_grid: cpufreq: introduce smart_grid cpufreq control")
Signed-off-by: Yipeng Zou <zouyipeng@huawei.com>
Tested-by: jifa <jifa@huawei.com>