hw/pci/pci_bridge: Fix typo in comment

Signed-off-by: NJulia Suvorova <jusual@redhat.com>
Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20200205185123.210209-1-jusual@redhat.com>
Signed-off-by: NLaurent Vivier <laurent@vivier.eu>

include/hw/pci/pci_bridge.h

@@ -108,7 +108,7 @@ void pci_bridge_dev_unplug_request_cb(HotplugHandler *hotplug_dev,
 
 /*
  * before qdev initialization(qdev_init()), this function sets bus_name and
- * map_irq callback which are necessry for pci_bridge_initfn() to
+ * map_irq callback which are necessary for pci_bridge_initfn() to
  * initialize bus.
  */
 void pci_bridge_map_irq(PCIBridge *br, const char* bus_name,