add nk_io at24_eeprom driver

hc

2023-02-14 796a7ef0befd21e25c2b9e42f53a6d7a4421941d

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# Locally computed:
sha256 74ee708b68340b65519a04a22c61921cdcf69a1d308600c212414b28e9e689ac  stella-5.0.2-src.tar.xz