EDD Cross-sell & Upsell - Move Cross-sells above the product listing at checkout

gistfile1.php

<?php

function sumobi_edd_csau_move_cross_sells_at_checkout() {
    // remove cross-sells from after the product listing at checkout
    remove_action( 'edd_after_checkout_cart', 'edd_csau_display_on_checkout_page' );

    // add the cross-sells before the product listing at checkout
    add_action( 'edd_before_checkout_cart', 'edd_csau_display_on_checkout_page' );
}
add_action( 'template_redirect', 'sumobi_edd_csau_move_cross_sells_at_checkout' );