A few comments:
1) Moved post to the TV Boxes forums
2) Since you mention inovato a couple of times in your post and post links to their site, it is important to point out the following (taken directly from the inovato site): "IMPORTANT NOTE: If you have any questions or problems with this process, by all means use the Armbian Forums to search for information, but please DO NOT ask questions if you can't find your answer. They don't support the Quadra firmware: We do. So please use the Support category on this forum."
I want others who might read this to be fully aware that Armbian does not support inovato based questions.
3) Armbian does not support TV Boxes, please read: https://forum.armbian.com/topic/16976-status-of-armbian-on-tv-boxes-please-read-first
4) I'm not aware of anyone who has successfully run armbian on any h616 based box. The h616 is a newish cpu (vs the older H6 which does have better support) and mainline linux support isn't all there yet
5) Unless you are a low level kernel / driver C developer, you probably have the wrong box to be experimenting with. Rockchip based TV boxes have pretty good community support.