radv: Use nir_opt_generate_bfi to generate bitfield_select

v2: Move to radv_optimize_nir_algebraic. Suggested by Georg.

Tested-by: Georg Lehmann <dadschoorse@gmail.com>
Reviewed-by: Georg Lehmann <dadschoorse@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31006>

src/amd/vulkan/radv_shader.c

@@ -197,6 +197,7 @@ radv_optimize_nir_algebraic(nir_shader *nir, bool opt_offsets, bool opt_mqsad)
       NIR_PASS(_, nir, nir_opt_constant_folding);
       NIR_PASS(_, nir, nir_opt_cse);
       NIR_PASS(more_algebraic, nir, nir_opt_algebraic);
+      NIR_PASS(_, nir, nir_opt_generate_bfi);
       NIR_PASS(_, nir, nir_opt_dead_cf);
    }