i965/gen9: Use raw PS invocation count for queries

Previously the number needed to be divided by 4 to get the proper results. Now
the hardware does the right thing. Through experimentation it seems Braswell
(CHV) does also need the division by 4.

Fixes piglit test:
arb_pipeline_statistics_query-frag

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>

src/mesa/drivers/dri/i965/gen6_queryobj.c

@@ -246,7 +246,7 @@ gen6_queryobj_get_results(struct gl_context *ctx,
        * and correctly emitted the number of pixel shader invocations, but,
        * whomever forgot to undo the multiply by 4.
        */
-      if (brw->gen >= 8 || brw->is_haswell)
+      if (brw->gen == 8 || brw->is_haswell)
          query->Base.Result /= 4;
       break;