KVM: arm: vgic-irqfd: Workaround changing kvm_set_routing_entry prototype

kvm_set_routing_entry is changing in -next, and causes things to
explode. Add a temporary workaround that should be dropped when
we hit 4.8-rc1
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

virt/kvm/arm/vgic/vgic-irqfd.c

@@ -41,12 +41,20 @@ static int vgic_irqfd_set_irq(struct kvm_kernel_irq_routing_entry *e,
  * kvm_set_routing_entry: populate a kvm routing entry
  * from a user routing entry
  *
+ * @kvm: the VM this entry is applied to
  * @e: kvm kernel routing entry handle
  * @ue: user api routing entry handle
  * return 0 on success, -EINVAL on errors.
  */
+#ifdef KVM_CAP_X2APIC_API
+int kvm_set_routing_entry(struct kvm *kvm,
+			  struct kvm_kernel_irq_routing_entry *e,
+			  const struct kvm_irq_routing_entry *ue)
+#else
+/* Remove this version and the ifdefery once merged into 4.8 */
 int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e,
 			  const struct kvm_irq_routing_entry *ue)
+#endif
 {
 	int r = -EINVAL;