Problems with ADC (and audio) in my overlay

My overlay works to enable the PRU, but it doesn't seem to work for ADC (it also doesn't work for the audio codec, but I know I still have to get the LDOs and nRESET correct).

Any idea why I can't enable the ADC? I'm able to enable the ADC with BB-ADC, but not when I copy the contents of that to my DTBO:

I only need three ADC channels, but I tried with all 7 and it made no difference.

Any insight would be much appreciated. Thanks!