Revert "ARM: mm: implement LoUIS API for cache maintenance ops"

This reverts commit 8428033e82a0a5d46bb762553da0fa8e19b75198.
Revert "ARM: kernel: update cpu_suspend code to use cache LoUIS operations"

This reverts commit 3f51d8fa81e5c98f3f1957b964160b6eee7e42d3.