Revert "xen/x2apic: enable x2apic mode when supported for HVM"
JIRA: https://issues.redhat.com/browse/RHEL-34602
Upstream Status: RHEL-only
Switching Xen HVM guests to x2apic mode led to CPU onlining problems on AWS instance types. The issue is also reproducible with upstream kernel. For the time being, revert RHEL9 change to avoid the regression.
Signed-off-by: Vitaly Kuznetsov vkuznets@redhat.com