Remove some slow, redundant memcpy implementations: memcpy_const/memcpy_qwc/memcpy_aligned.
Remove all custom memcpy usage from core pcsx2 and remove memcpy_fast from plugins.
Remove memcpy_amd usages from plugins. No more custom implementations in plugins.
Merge pull request #215 from xsacha/memcpy

Remove some slow, redundant memcpy implementations: memcpy_const/memcpy_...