[RFC] radeon bo/cs API cleanup

[Dave Airlie]

Hi,

so Michel pointed out that the libdrm_radeon API was pretty unmaintainble.

Reasons:
1. inlines in headers mean API/ABI is fixed completely.
2. All of structure internals for bo/cs are exposed.
3. RADEON_BO_TRACK changed the library API when on/off.

So I
a) removed bo tracking
b) split the cs/bo structs into public/private parts and minimised the
members, the cs_int/bo_int need to reflect the public bits.
c) left some members intact for fast paths for functions that need it
(write_dword)

3 patches attached, libdrm/ddx/mesa (no r300g bits yet) to clean the API of
all of this.

I'd like to then declare this as the stable API going forward.
Dave.
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