If AVX is supported, don't need dst == src, this can save a move.

Move the Andnps macro around, and update callsites in Liftoff.

Bug: v8:11190
Change-Id: I7307b70943fdd91550d608cb91e9890f23d1b3ad
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2750726Reviewed-by: Bill Budge <bbudge@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73386}