Revert "Call _ml_processor_start to register boot CPU with mach."

This reverts commit 569df192d545f58caff9c91f6da8189d361614fc.
Revert "Revert "Call _ml_processor_start to register boot CPU with mach.""

This reverts commit e6bf7880a6c1f57f2320d0a2407029b76c03077f.
AppleS5L8930XIO works perfectly now.