LLd and Scd should be used for StoreType::kI64Store* types.

Change-Id: Ic645c9149c7ade95e0a36acadb48d246ee817469
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3655179
Auto-Submit: Yu Liu <liuyu@loongson.cn>
Commit-Queue: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Reviewed-by: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Cr-Commit-Position: refs/heads/main@{#80657}