add nk_io at24_eeprom driver

hc

2023-02-14 796a7ef0befd21e25c2b9e42f53a6d7a4421941d

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# From https://www.gnu.org/software/classpath/announce/20120307.html
sha256    f929297f8ae9b613a1a167e231566861893260651d913ad9b6c11933895fecc8    classpath-0.99.tar.gz