!474 [sync] PR-447: add perf loongarch support

Merge Pull Request from: @openeuler-sync-bot 
 

Origin pull request: 
https://gitee.com/openeuler/kernel/pulls/447 
 
add architecture related perf support for loongarch 
 
Link:https://gitee.com/openeuler/kernel/pulls/474

 

Reviewed-by: Zheng Zengkai <zhengzengkai@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>
Acked-by: Zheng Zengkai <zhengzengkai@huawei.com>