piix4 don't use pci_irq_levels at all

Signed-off-by: Juan Quintela <[email protected]>
Signed-off-by: Anthony Liguori <[email protected]>
diff --git a/hw/piix_pci.c b/hw/piix_pci.c
index c9fef92..ad85eba 100644
--- a/hw/piix_pci.c
+++ b/hw/piix_pci.c
@@ -323,8 +323,6 @@
     pci_conf[0xab] = 0x00;
     pci_conf[0xac] = 0x00;
     pci_conf[0xae] = 0x00;
-
-    memset(pci_irq_levels, 0, sizeof(pci_irq_levels));
 }
 
 static void piix_save(QEMUFile* f, void *opaque)