bbai64: losing my mind trying to figure this out

James Anderson sourced most of this doc based on a fork of the
BeagleBone Black or BeagleBone AI documentation:

See https://git.beagleboard.org/beagleboard/beaglebone-ai-64/-/commit/7440473917c08fb9bebc9dbeddc33b648b55762e#3086192f306e92a8bc70c5bbb05a122f1b464ad4_0_18