cpufreq: make interface functions and lock holding state clear

mainline inclusion
from mainline-v5.19-rc1
commit 514ff1bc
category: cleanup
bugzilla: https://gitee.com/openeuler/kernel/issues/I8EI9L
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=514ff1bcd98d7f57361025e2200b803d3ddde6c8



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cpufreq_offline() calls offline() and exit() under the policy rwsem
But they are called outside the rwsem in cpufreq_online().

Make cpufreq_online() call offline() and exit() as well as online() and
init() under the policy rwsem to achieve a clear lock relationship.

All of the init() and online() implementations in the tree only
initialize the policy object without attempting to acquire the policy
rwsem and they won't call cpufreq APIs attempting to acquire it.

Signed-off-by: Schspa Shi <schspa@gmail.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
[ rjw: Changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Conflicts:
	drivers/cpufreq/cpufreq.c

Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>