mesa/st/nir: fix naked lowering pass call

Not using the macro means no nir_validate in debug builds, resulting in
problems showing up only after later passes.

Signed-off-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

src/mesa/state_tracker/st_glsl_to_nir.cpp

@@ -645,7 +645,7 @@ st_link_nir(struct gl_context *ctx,
          mask = (nir_variable_mode)(mask | nir_var_shader_out);
 
       nir_shader *nir = shader->Program->nir;
-      nir_lower_io_to_scalar_early(nir, mask);
+      NIR_PASS_V(nir, nir_lower_io_to_scalar_early, mask);
       st_nir_opts(nir);
    }