This CL assures scratch registers are passed where needed
and cleans up Simd functions shared between TF and LO.

Change-Id: Ib7633e0d51f3aa92d2bcdfc69d0efe779062af62
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3489239Reviewed-by: Junliang Yan <junyan@redhat.com>
Commit-Queue: Milad Farazmand <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/main@{#79295}