KVM: consolidate ioapic/ipi interrupt delivery logic

Use kvm_apic_match_dest() in kvm_get_intr_delivery_bitmask() instead
of duplicating the same code. Use kvm_get_intr_delivery_bitmask() in
apic_send_ipi() to figure out ipi destination instead of reimplementing
the logic.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c
index b71c044..43969bb 100644
--- a/virt/kvm/ioapic.c
+++ b/virt/kvm/ioapic.c
@@ -147,7 +147,10 @@
 	DECLARE_BITMAP(deliver_bitmask, KVM_MAX_VCPUS);
 	int i, r = -1;
 
-	kvm_get_intr_delivery_bitmask(kvm, e, deliver_bitmask);
+	kvm_get_intr_delivery_bitmask(kvm, NULL, e->fields.dest_id,
+			e->fields.dest_mode,
+			e->fields.delivery_mode == IOAPIC_LOWEST_PRIORITY,
+			0, deliver_bitmask);
 
 	if (find_first_bit(deliver_bitmask, KVM_MAX_VCPUS) >= KVM_MAX_VCPUS) {
 		ioapic_debug("no target on destination\n");