internal/cpu: define kdsaQuery for s390
internal/cpu: define kdsaQuery for s390

Patch from Andreas Krebbel.

Change-Id: I8dc0342cd03f9b2ece98e9b8b0fb4bdb0d115ec1
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/201037
Reviewed-by: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>

golang/gofrontend,golang/gofrontend,golang/gofrontend,golang/gofrontend