System clock config cleanup.
System clock config cleanup.

* Use HAL_PWREx_ConfigSupply to enable LDO.
* Use __HAL_PWR_GET_FLAG to check for VOSRDY.

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