intel/fs,vec4: Stuff the constant data from NIR in the end of the program

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6244>

src/intel/compiler/brw_vec4.cpp

@@ -3001,6 +3001,7 @@ brw_compile_vs(const struct brw_compiler *compiler, void *log_data,
       }
       g.generate_code(v.cfg, 8, v.shader_stats,
                       v.performance_analysis.require(), stats);
+      g.add_const_data(shader->constant_data, shader->constant_data_size);
       assembly = g.get_assembly();
    }