add nk_io at24_eeprom driver

hc

2023-02-14 796a7ef0befd21e25c2b9e42f53a6d7a4421941d

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if TARGET_MS7720SE
 
config SYS_BOARD
    default "ms7720se"
 
config SYS_CONFIG_NAME
    default "ms7720se"
 
endif