drivers: base: cacheinfo: Add helper to search cacheinfo by of_node

hulk inclusion
category: feature
bugzilla: 34278
CVE: NA

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The MPAM ACPI table holds a PPTT-offset that describes a cache. Add a
helper cacheinfo_shared_cpu_map_search() to search the cacheinfo
structures for a cache that represents this firmware description.

The cacheinfo structures are freed and allocated over CPU online/offline,
the caller of this helper must hold the cpu-hotplug read lock while
the helper runs, and while it holds the return value.

Signed-off-by: James Morse <james.morse@arm.com>
Link: http://www.linux-arm.org/git?p=linux-jm.git;a=patch;h=9e5b7ec7c145019f7160c56795ede536f0de5347


Signed-off-by: Wang ShaoBo <bobo.shaobowang@huawei.com>
Reviewed-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Reviewed-by: Cheng Jian <cj.chengjian@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Cheng Jian <cj.chengjian@huawei.com>