add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

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if STM32F7
 
config TARGET_STM32F746_DISCO
    bool "STM32F746 Discovery board"
 
source "board/st/stm32f746-disco/Kconfig"
 
endif