Reverted ARMCM4-STM32F429-DISCOVERY-SDRAM demo

Anything related to LTDC or DMA2D was removed from that demo.
Please refer to the *-DMA2D demo for those drivers.
Automated ILI9341 driver

The ILI9341 driver is now compiled from the ST_STM32F429I_DISCOVERY
board, so that it can be shared among multiple projects.

It is switched on by defining ILI9341_USE_DRIVER TRUE in halconf.h
(see ARMCM4-STM32F429-DISCOVERY-DMA2D demo)
Merge pull request #11 from TexZK/master

Reverted ARMCM4-STM32F429-DISCOVERY-SDRAM demo