[riscv] Adjsut name of Latency

Change-Id: If29e4190ccc3b8f320273d61ba9117d3f4fd3836
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/5717465


Commit-Queue: Ji Qiu <qiuji@iscas.ac.cn>
Reviewed-by: Ji Qiu <qiuji@iscas.ac.cn>
Cr-Commit-Position: refs/heads/main@{#95141}