ynl: print xdp-zc-max-segs in the sample

Technically we don't have to keep extending the sample, but it
feels useful to run these tools locally to confirm everything
is working.
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20230727163001.3952878-5-sdf@google.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

tools/net/ynl/samples/netdev.c

@@ -38,6 +38,8 @@ static void netdev_print_device(struct netdev_dev_get_rsp *d, unsigned int op)
 			printf(" %s", netdev_xdp_act_str(1 << i));
 	}
 
+	printf(" xdp-zc-max-segs=%u", d->xdp_zc_max_segs);
+
 	name = netdev_op_str(op);
 	if (name)
 		printf(" (ntf: %s)", name);