i965: Initialize batchbuffer and state modules before extensions.

i965: Initialize batchbuffer and state modules before extensions.

We only want to enable ARB_transform_feedback2 if we can write to
registers from batchbuffers.  In order to test that, we need to be able
to submit batches.  And for batches to work, we need to program the
initial pipeline state (like PIPELINE_SELECT), which is done from
brw_state_init().

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>