Revert "[PATCH 3/3] Optimize ARM memset and memzero functions"

This reverts commit 47ee42c063dacc4b3490f8437f3f04fb4a53d3c8.
Revert "[PATCH 2/3] Optimize copy_page for modern ARM platforms"

This reverts commit 841ebc40a75de12f9366ecbf04f401ceea263712.