[Mesa-dev] Copying common u_format from gallium/auxiliary to broadcom/util

[abergmeier at gmx.net]

Currently broadcom/compiler does not link on its own. It references undefined symbols to:
- `util_format_description`
- `util_format_is_unorm` 
- `util_format_is_float`

For gallium/v3d, these get provided by gallium/auxiliary. Seems to be an odd dependency to me.
I would now like to copy at least these 3 symbols to broadcom/util with a `v3d_` prefix. This way broadcom/compiler has no implicit dependency on gallium anymore.
Any opinions or better ideas?