ACPI: bus: Introduce acpi_dev_for_each_child()

mainline inclusion
from mainline-v5.19-rc
commit cf6ba075
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I67QNJ
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=cf6ba0750a22a54f5101986401271429995cc4a0



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Introduce a wrapper around device_for_each_child() to iterate over
the children of a given ACPI device object.

This function will be used in subsequent change sets.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Zhang Zekun <zhangzekun11@huawei.com>
Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>