got some interesting warnings

```
build/de10nano/de10nano.dts:55.31-60.5: Warning (simple_bus_reg): /soc/interrupt-controller: missing or empty reg/ranges property
build/de10nano/de10nano.dts:82.38-89.5: Warning (simple_bus_reg): /soc/framebuffer@f0000000: simple-bus unit address format error, expected "c8000000"
build/de10nano/de10nano.dts:62.38-66.5: Warning (unique_unit_address): /soc/soc_controller@f0000000: duplicate unit-address (also used in node /soc/framebuffer@f0000000)
```