boards: stm32f769i_disc0: add touchscreen support

Add support for the touchscreen controller on STM32F769I-DISC0(MB1166).
The touchscreen uses Focaltech FT6202 which is compatible with FT5336.
Tested with kscan_touch sample application.

Signed-off-by: Konstantinos Papadopoulos <kostas.papadopulos@gmail.com>
4 files changed