perf c2c: Refactor node header

maillist inclusion
category: Feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I53L83
CVE: NA

Reference: https://lore.kernel.org/all/20210104020930.GA4897@leoy-ThinkPad-X240s/



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The node header array contains 3 items, each item is used for one of
the 3 flavors for node accessing info.  To extend sorting on all load
references and not always stick to HITMs, the second header string
"Node{cpus %hitms %stores}" should be adjusted (e.g. it's changed as
"Node{cpus %loads %stores}").

For this reason, this patch changes the node header array to three
flat variables and uses switch-case in function setup_nodes_header(),
thus it is easier for altering the header string.

Signed-off-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Reviewed-by: Wei Li <liwei391@huawei.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>