DMA Exported Constants

Modules
	Clear Flags Defines
	Flags defines which can be used with LL_DMA_WriteReg function.
	Get Flags Defines
	Flags defines which can be used with LL_DMA_ReadReg function.
	IT Defines
	IT defines which can be used with LL_DMA_ReadReg and LL_DMA_WriteReg functions.
	CHANNEL
	Transfer Direction
	Transfer mode
	Peripheral increment mode
	Memory increment mode
	Peripheral data alignment
	Memory data alignment
	Transfer Priority level
	Transfer peripheral request