OCPBUGS-31876: Enable UDP aggregation on s390x

Reverts the changes to disable UDP aggregation made in:
* daef1a6
* 919dba8
which specifically disable UDP aggregation on s390x.

This works now, since https://issues.redhat.com/browse/OCPBUGS-18935
is fixed.

Signed-off-by: Dominik Werle <dwerle@redhat.com>

pkg/network/ovn_kubernetes.go

@@ -13,7 +13,6 @@ import (
 	"os"
 	"path/filepath"
 	"reflect"
-	goruntime "runtime"
 	"strconv"
 	"strings"
 	"time"
@@ -695,11 +694,6 @@ func bootstrapOVNHyperShiftConfig(hc *hypershift.HyperShiftConfig, kubeClient cn
 func getDisableUDPAggregation(cl crclient.Reader) bool {
 	disable := false
 
-	// Disable by default on s390x because it sometimes doesn't work there; see OCPBUGS-2532
-	if goruntime.GOARCH == "s390x" {
-		disable = true
-	}
-
 	cm := &corev1.ConfigMap{}
 	if err := cl.Get(context.TODO(), types.NamespacedName{
 		Namespace: "openshift-network-operator",