KVM: make irq ack notifier functions static

sparse says:

arch/x86/kvm/x86.c:107:32: warning: symbol 'kvm_find_assigned_dev' was not declared. Should it be static?
arch/x86/kvm/i8254.c:225:6: warning: symbol 'kvm_pit_ack_irq' was not declared. Should it be static?
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Avi Kivity <avi@qumranet.com>

arch/x86/kvm/i8254.c

@@ -222,7 +222,7 @@ int pit_has_pending_timer(struct kvm_vcpu *vcpu)
 	return 0;
 }
 
-void kvm_pit_ack_irq(struct kvm_irq_ack_notifier *kian)
+static void kvm_pit_ack_irq(struct kvm_irq_ack_notifier *kian)
 {
 	struct kvm_kpit_state *ps = container_of(kian, struct kvm_kpit_state,
 						 irq_ack_notifier);

arch/x86/kvm/x86.c

@@ -104,7 +104,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
 	{ NULL }
 };
 
-struct kvm_assigned_dev_kernel *kvm_find_assigned_dev(struct list_head *head,
+static struct kvm_assigned_dev_kernel *kvm_find_assigned_dev(struct list_head *head,
 						      int assigned_dev_id)
 {
 	struct list_head *ptr;