how to merge device tree overlays to a single .dtb at build time?
My board boots via U-Boot and AFAIK that bootloader does not support _device tree overlays_ , so I'm probably forced to generate a **single, static** `.dtb` will all relevant overlays (and settings??) already applied to it. In principle that would be okay for me, but how to do that?
Is there some command line tool that takes `.dtb` and `.dtbo` files resp. `.dts` and `.dtsi` files and combines them into a single `.dtb` / `.dts`?
`dtc` doesn't seem to do that job.
The ultimate goal is to get I²C working on a Raspberry B+ that boots _via U-Boot_.