add at24 driver

hc

2023-11-06 15ade055295d13f95d49e3d99b09f3bbfb4a43e7

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# md5 from https://pypi.python.org/pypi/portend/json, sha256 locally computed
md5    a45e001d40227c4529b1a7186f4442f5  portend-1.8.tar.gz
sha256    7de919b82c4ac60d4768fe80a2557290661aa665b7c427de6249d8cb2fde5561  portend-1.8.tar.gz