r600: enable tess_input_info for TES

There might be a nicer way to do this, but this is at least correct.

This fixes:
KHR-GL44.tessellation_shader.single.max_patch_vertices
KHR-GL44.tessellation_shader.tessellation_control_to_tessellation_evaluation.gl_PatchVerticesIn

Reviewed-By: Gert Wollny <gert.wollny@collabora.com>
Cc: mesa-stable@lists.freedesktop.org
(cherry picked from commit d73f1026)