anv,nir: Lower quad_broadcast with dynamic index in NIR

This is required for the subgroupBroadcastDynamicId feature that was
added in Vulkan 1.2.

Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>

src/intel/compiler/brw_nir.c

@@ -713,6 +713,7 @@ brw_preprocess_nir(const struct brw_compiler *compiler, nir_shader *nir,
       .lower_to_scalar = true,
       .lower_vote_trivial = !is_scalar,
       .lower_shuffle = true,
+      .lower_quad_broadcast_dynamic = true,
    };
    OPT(nir_lower_subgroups, &subgroups_options);