Reason for revert:
Breaks g++ build.

Original issue's description:
> [turbofan] ARM: Implement vswp and use in gap resolver
>
> Use vswp to switch double-precision registers in the gap resolver, with fall
> back temp register-based code if NEON is not available.
>
> BUG=
>
> Committed: https://crrev.com/2837c2e65a2ee5b9fc610f30ce1215f52323ecbd
> Cr-Commit-Position: refs/heads/master@{#39209}

BUG=

Review-Url: https://codereview.chromium.org/2314043002
Cr-Commit-Position: refs/heads/master@{#39264}