i965: Drop AUB_TRACE_* stuff.

i965: Drop AUB_TRACE_* stuff.

This was used for aubdumping (deleted a while ago) and INTEL_DEBUG=bat
decoding (deleted recently).

While we're changing parameters, delete the wrapper macro and make the
actual function brw_state_batch instead of __brw_state_batch.

This subsumes a patch by Emil Velikov to drop this from BLORP.

Reviewed-by: Emil Velikov <emil.velikov@collabora.com>