This CL fixes macro-asm to take in scratch registers as arguments.

Change-Id: Ib6070c9a9df050ce201d36027a0be44c77a54ba3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3773875
Commit-Queue: Milad Farazmand <mfarazma@redhat.com>
Reviewed-by: Junliang Yan <junyan@redhat.com>
Cr-Commit-Position: refs/heads/main@{#81832}