nir_ allow nir_lower_clip_halfz to run in tess eval shader

Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6027>
diff --git a/src/compiler/nir/nir_lower_clip_halfz.c b/src/compiler/nir/nir_lower_clip_halfz.c
index 6db1910..254c498 100644
--- a/src/compiler/nir/nir_lower_clip_halfz.c
+++ b/src/compiler/nir/nir_lower_clip_halfz.c
@@ -57,7 +57,8 @@
 nir_lower_clip_halfz(nir_shader *shader)
 {
    if (shader->info.stage != MESA_SHADER_VERTEX &&
-       shader->info.stage != MESA_SHADER_GEOMETRY)
+       shader->info.stage != MESA_SHADER_GEOMETRY &&
+       shader->info.stage != MESA_SHADER_TESS_EVAL)
       return;
 
    nir_foreach_function(function, shader) {