i965: Add enums for 3DSTATE_TE field values.

i965: Add enums for 3DSTATE_TE field values.

3DSTATE_TE has partitioning, output topology, and domain fields,
each of which has several enumerated values.  We'll also need to
switch on the domain, so enums (rather than #defines) seem like a
natural fit.

I chose to put these in brw_compiler.h because they'll be stored
in struct brw_tes_prog_data, which will live there.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Kristian Høgsberg <krh@bitplanet.net>