[dev.simd] cmd/compile: generated simd*ops files weren't up to date

[dev.simd] cmd/compile: generated simd*ops files weren't up to date

I re-ran the generator in arch/internal/simd to
verify a clean move of the intrinsics helpers, and
these changes (which look correct) appeared.

Change-Id: I28a0e8bd144d47aec216f557f238362f238d0428
Reviewed-on: https://go-review.googlesource.com/c/go/+/681499
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Junyang Shao <shaojunyang@google.com>