add nk_io at24_eeprom driver

hc

2023-02-14 796a7ef0befd21e25c2b9e42f53a6d7a4421941d

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