Apologies for jumping in here but I'm trying to chase down the same for the FriendlyAram NanoPi M1.
My device tree foo is, well, bar, so please indulge me here. Looking at the schematics for the 2 boards they seem to share the same pinnng for USB OTG (I think) http://linux-sunxi.org/images/8/88/Orange_pi-lite-v1_1.pdf and http://wiki.friendlyarm.com/wiki/images/d/d8/NanoPi-M1-1603-Schematic.pdf
Looking at sunxi-common-regulators.dtsi, the 'reg_usb0_vbus' section has 'status' marked as disabled. Is this the one that should be set to 'ok'?
I'd add a link to the relevant but Github is truncating the listing of files.
Put your kernel tree under sources/LINUX_NEXT. For example you have linux-4.13-rc1 directory there. Then I have in the /lib/config/sources/amlogic-s912.conf file: