Revert "JIT64: optimize CA calculations"
Merge pull request #981 from FioraAeterna/revert-852-optimizeca

Revert "JIT64: optimize CA calculations"
Remove debug printf from earlier commit
Merge pull request #982 from FioraAeterna/removedebug

Remove debug printf from earlier commit
raw memcards: revert last change so flushes are still time-driven.
It turns out the actual slowdown was from memcpy'ing the entire
memcard buffer...not synchronization overhead or the flush itself.