kvm: Enable in-kernel irqchip support by default

As MSI is now fully supported by KVM (/wrt available features in
upstream), we can finally enable the in-kernel irqchip by default.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
diff --git a/kvm-all.c b/kvm-all.c
index d222012..1913d6a 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -1099,7 +1099,7 @@
 
     if (QTAILQ_EMPTY(&list->head) ||
         !qemu_opt_get_bool(QTAILQ_FIRST(&list->head),
-                           "kernel_irqchip", false) ||
+                           "kernel_irqchip", true) ||
         !kvm_check_extension(s, KVM_CAP_IRQCHIP)) {
         return 0;
     }