Revert "Fix arch/arm/mach-msn/Kconfig"

This reverts commit 21a2d4ae5df246d48aef05c0b39afc73a184afb5.
Revert "Memutils: Faster memcpy performance for Krait"

This reverts commit 9cdaec8768370ad07c7229d461be5ae0fd481940.