Applied FedeTFT corrections

...S/Device/ST/STM32F7xx/Source/Templates/system_stm32f7xx.c

miosix/arch/common/drivers/sd_stm32f2_f4_f7.cpp

...cortexM7_stm32f7/stm32f767zi_nucleo/core/stage_1_boot.cpp

...rtexM7_stm32f7/stm32f767zi_nucleo/interfaces-impl/bsp.cpp

...xM7_stm32f7/stm32f767zi_nucleo/interfaces-impl/bsp_impl.h

...texM7_stm32f7/stm32f769ni_discovery/core/stage_1_boot.cpp

...xM7_stm32f7/stm32f769ni_discovery/interfaces-impl/bsp.cpp

..._stm32f7/stm32f769ni_discovery/interfaces-impl/bsp_impl.h

miosix/config/Makefile.inc

...arch/cortexM7_stm32f7/stm32f746zg_nucleo/board_settings.h

...arch/cortexM7_stm32f7/stm32f767zi_nucleo/board_settings.h

...h/cortexM7_stm32f7/stm32f769ni_discovery/board_settings.h

miosix/config/options.cmake