Revert "Apply arch: arm: lib: optimize memcpy for cortex-A15 to memutils"

This reverts commit 968ef4133f1fed1ff4c5331fe6b15c9f7dffdbfc.
Revert "msm: memutils: memcpy, memmove optimization"

This reverts commit d494d8622aa6a8673f1545f90af65f2605f259fb.
Revert "msm: memutils: memcpy, memmove, copy_page optimization"

This reverts commit 518502a6356a7a9e3828be6d918aafe9434fabd9.