i965: Actually upload sampler state pointers for the VS unit on Gen6.

We already program all the sampler state correctly, we just didn't give
the GPU a pointer to it for the VS stage.  Thus, any texturing other
than texelFetch() wouldn't work.

Fixes piglit test vs-textureLod-miplevels and 99 of oglconform's
glsl-bif-tex subtests.

NOTE: This is a candidate for the 8.0 branch.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

src/mesa/drivers/dri/i965/gen6_sampler_state.c

@@ -41,7 +41,7 @@ upload_sampler_state_pointers(struct brw_context *brw)
 	     GS_SAMPLER_STATE_CHANGE |
 	     PS_SAMPLER_STATE_CHANGE |
 	     (4 - 2));
-   OUT_BATCH(0); /* VS */
+   OUT_BATCH(brw->sampler.offset); /* VS */
    OUT_BATCH(0); /* GS */
    OUT_BATCH(brw->sampler.offset);
    ADVANCE_BATCH();