Clean up system clockconfig function.
Clean up system clockconfig function.

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