This now makes it so TurboFan now uses full pointer loads for arguments values
located on stack.

Bug: v8:8876, v8:7703
Change-Id: Ib82d6f3b0f4c8d33669c7f86ce803381d210c019
Reviewed-on: https://chromium-review.googlesource.com/c/1480382Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59798}