Fix minor issues in the OV2640 driver.
Fix minor issues in the OV2640 driver.

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