i965: reenable ARB_cull_distance.

Now the lowering pass is fixed we can reenable culling.

Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/src/mesa/drivers/dri/i965/intel_extensions.c b/src/mesa/drivers/dri/i965/intel_extensions.c
index 878bd84..0f0d1ce 100644
--- a/src/mesa/drivers/dri/i965/intel_extensions.c
+++ b/src/mesa/drivers/dri/i965/intel_extensions.c
@@ -291,7 +291,7 @@
       ctx->Extensions.ARB_blend_func_extended =
          !driQueryOptionb(&brw->optionCache, "disable_blend_func_extended");
       ctx->Extensions.ARB_conditional_render_inverted = true;
-      ctx->Extensions.ARB_cull_distance = false;
+      ctx->Extensions.ARB_cull_distance = true;
       ctx->Extensions.ARB_draw_buffers_blend = true;
       ctx->Extensions.ARB_ES3_compatibility = true;
       ctx->Extensions.ARB_fragment_layer_viewport = true;