Merge "Revert of Specialize Sk2d for ARM64 (patchset #3 id:40001 of https://codereview.chromium.org/1020963002/)" into master-skia

https://skia.googlesource.com/skia/+/c3ce1d28a53e70f4faa71f9d5bbda605b0664830

Change-Id: Idc7e2d47df5952c84e038fcb08e43fbee40a80ba