Support for adding the nucleo H743ZI

[FT81xMania]

Daniel first of all thanks for supporting us with the generic kernel for STM32 in the arduino IDE, it works very well in the 1.8.13 IDE. In the team we have been able to work on a library that can control screens with EVE FT81x chips.

Following the all the steps to add the nucleo H743ZI variant to the generic core, it gives us this result:

arm-none-eabi-g++: error: missing argument to '-mcpu='
exit status 1
Error compilando para la tarjeta Nucleo-144 boards.

What else must be added for the variant to respond correctly?

chain: gcc-arm-none-eabi-7-2017-q4-major-win32.zip