i965: Drop the BRW_BATCH_STRUCT macro.

It's used in exactly one place these days, and not much simpler than
just calling intel_batchbuffer_data directly.

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>

src/mesa/drivers/dri/i965/brw_state.h

 /***********************************************************************
  * brw_state_batch.c
  */
-#define BRW_BATCH_STRUCT(brw, s) \
-   intel_batchbuffer_data(brw, (s), sizeof(*(s)), RENDER_RING)
-
 void *brw_state_batch(struct brw_context *brw,
                       int size, int alignment, uint32_t *out_offset);
 uint32_t brw_state_batch_size(struct brw_context *brw, uint32_t offset);

src/mesa/drivers/dri/i965/brw_urb.c

       while (--pad);
    }
 
-   BRW_BATCH_STRUCT(brw, &uf);
+   intel_batchbuffer_data(brw, &uf, sizeof(uf), RENDER_RING);
 }