[U-Boot] Disable axp209 auto start

[Florian HESLOUIN]

Hey,

I'm using an Allwinner A20 board (Olimex Lime2) with U-boot 2017-09. I'm 
looking for a way to disable board auto start when DC is plugged in.

Is there any device tree trigger or patch to be used against sunxi 
u-boot source code  ?

I was patching sunxi_board_init() with a custom function but it does not 
work so well any more, any advices  ?

Thanks
Florian