Pointer compression is not supported in arm32 and we will not encounter
those MachineRepresentations.

Bug: v8:7703
Change-Id: I72c94d57b27710bdca54d649755a91e869b4947e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2546686
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Auto-Submit: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71256}