Looking to see about creating an AGL demo image on STM32MP157C-DK2 Discovery kit.

It's a $100 board that has a 4" display, a dual core 650mhz A7 + 209mhz M4, and a Vivante GPU, and there's meta-st-stm32mp stuff hanging around somewhere that might be helpful.

Maybe not enough GPU to run the demo at 1080p, maybe more useful as a cluster demo or with a different UI running at the display's native 800x480. People who know more about the graphics stuff than me might be able to tell what it's capable of.

Working with calebprovost on this

We have...some kind of a machine template started (will submit to gerrit soon). Not sure what else we're missing. This one fails with a circular dependency between do_image_wic and do_image_complete.