BBAI PRU DT overlays

[lorforlinux]

@jadonk @RobertCNelson please review the overlays :) everything has been tested on BBAI.
I will push the cloud9-examples soon ;)

[RobertCNelson]

@lorforlinux please rebase this work in the new repo branch so that I can pull them in.

[lorforlinux]

@RobertCNelson sorry, I just wanted to make sure everything is working on v4.19x. I will start rebasing this week.

[lorforlinux]

@RobertCNelson rebase is causing a lot of serious conflict issues, I am trying to resolve them from last 24+ hours but it always creates some change that leads to errors :(

[RobertCNelson]

At @lorforlinux it might be best to just use "meld" or similar tool and just copy the changes over manually and recommit.. What ever you do in 5.4.x-ti-overlays, i'll just end up rebasing for every 5.4+1 kernel that comes out. ;)

[lorforlinux]

@RobertCNelson I attempted doing it line by line multiple times using meld as you suggested but it always results in a kernel panic somehow :(

I also tried updating things just to make the BBAI dtb compile but it's the same for that too! there are some conflicting nodes with the same name and some nodes have been split to different places in comparison to v4.19x on which the compatibility layer depends. It's maybe a lot to ask but is it possible to update the uBoot for v4.19x? so that I can complete my project on time. There are still more bone buses to add in the compatibility layer and I need to complete the documentation also.

I have spent a lot of time resolving the issue in v5.4x-ti-overlays and I think you agree with me that working things at one place is better than two half-done things.