The implementation is pretty much the same, and we instead delegate to a
macro assembler to decide if we want the sse or avx instruction.

This unification will simplify optimization of constant shifts later on.

Bug: v8:10115
Change-Id: I68e60cb3fd51156438989812be189f71e6e47ba7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2026470Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66121}