mpc85xx_pci_map_irq: change "unknow" to "unknown"

Signed-off-by: NScott Wood <scottwood@freescale.com>
Acked-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>

hw/ppce500_pci.c

@@ -198,7 +198,7 @@ static int mpc85xx_pci_map_irq(PCIDevice *pci_dev, int irq_num)
             ret = (irq_num + devno - 0x10) % 4;
             break;
         default:
-            printf("Error:%s:unknow dev number\n", __func__);
+            printf("Error:%s:unknown dev number\n", __func__);
     }
 
     pci_debug("%s: devfn %x irq %d -> %d  devno:%x\n", __func__,