Fix H7 flash latency.
Fix H7 flash latency.

* VOS1 ~1.2v the flash latency should be 2 cycles.

kwagyeman/openmv,kwagyeman/openmv,iabdalkader/openmv,iabdalkader/openmv,kwagyeman/openmv,openmv/openmv,iabdalkader/openmv,openmv/openmv,kwagyeman/openmv,iabdalkader/openmv,openmv/openmv,openmv/openmv