Baseline scratch registers don't include the regular kScratchRegister
(for now at least) because the rest of the system doesn't use the
ScratchRegisterScope (yet).

Bug: v8:11429
Change-Id: I7a2f27a814e262e5b14bd30b2ae53d53e173bcc3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2697194Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Auto-Submit: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72771}