configs: stm32f769-disco: support FRD400B25025-A-CTK display

configs: stm32f769-disco: support FRD400B25025-A-CTK display

Support FRIDA FRD400B25025-A-CTK display on stm32f769-disco board.

As reported in the section 8.3 (i. e. Board revision history) of document
UM2033 (i. e. Discovery kit with STM32F769NI MCU) these are the changes
related to the board revision addressed by the patch:
- Board MB1166 revision A-09:
- LCD FRIDA FRD397B25009-D-CTK replaced by FRIDA FRD400B25025-A-CTK

This means that the MB1166-A09 is using an NT35510 panel controller,
unlike the previous versions which use an OTM8009A controller.
Therefore, let's add support for NT35510 panel handling to the
stm32f769-disco board configurations.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>