radv/aco: implement logic64 instead of lowering

to make use of the scalar ALU

Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5527>

src/amd/compiler/aco_instruction_selection_setup.cpp

@@ -1020,7 +1020,6 @@ setup_nir(isel_context *ctx, nir_shader *nir)
       nir_lower_pack(nir);
 
    /* lower ALU operations */
-   // TODO: implement logic64 in aco, it's more effective for sgprs
    nir_lower_int64(nir, nir->options->lower_int64_options);
 
    if (nir_lower_bit_size(nir, lower_bit_size_callback, NULL))