LTDC Exported Constants

Modules
	LTDC Error Code
	LTDC Layer
	LTDC HS POLARITY
	LTDC VS POLARITY
	LTDC DE POLARITY
	LTDC PC POLARITY
	LTDC SYNC
	LTDC BACK COLOR
	LTDC Blending Factor1
	LTDC Blending Factor2
	LTDC Pixel format
	LTDC Alpha
	LTDC LAYER Config
	LTDC Interrupts
	LTDC Flags
	LTDC Reload Type