KVM: Move irq ack notifier list to arch independent code

Mask irq notifier list is already there.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index cc2d749..4aa5e1d 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -187,6 +187,7 @@
 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 	struct kvm_irq_routing_table *irq_routing;
 	struct hlist_head mask_notifier_list;
+	struct hlist_head irq_ack_notifier_list;
 #endif
 
 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER