cpu: use IsProcessorFeaturePresent to calculate ARM64 on windows

This CL started as revert of CL 757482.

Fixes golang/go#76791

Change-Id: Iaa78c73a6dde8d735e74e2c57c86375ccd5902c7
Reviewed-on: https://go-review.googlesource.com/c/sys/+/758960
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Quim Muntal <quimmuntal@gmail.com>
LUCI-TryBot-Result: golang-scoped@luci-project-accounts.iam.gserviceaccount.com <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>