KVM: ia64: add a dummy irq ack notification

Before enabling notify_acked_irq for ia64, leave the related APIs as
nop-op first.

Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c
index 515cd7c..53772bb 100644
--- a/virt/kvm/ioapic.c
+++ b/virt/kvm/ioapic.c
@@ -386,7 +386,7 @@
 		break;
 #ifdef	CONFIG_IA64
 	case IOAPIC_REG_EOI:
-		kvm_ioapic_update_eoi(ioapic->kvm, data);
+		kvm_ioapic_update_eoi(ioapic->kvm, data, IOAPIC_LEVEL_TRIG);
 		break;
 #endif