pci-ohci: Add missing 'break' in ohci_service_td

Device communication errors need to be reported to driver.
Add a debug message while at it.
Signed-off-by: NJan Vesely <jano.vesely@gmail.com>
Acked-by: NGerd Hoffmann <kraxel@gmail.com>
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>

hw/usb/hcd-ohci.c

@@ -1143,7 +1143,9 @@ static int ohci_service_td(OHCIState *ohci, struct ohci_ed *ed)
             switch (ret) {
             case USB_RET_IOERROR:
             case USB_RET_NODEV:
+                DPRINTF("usb-ohci: got DEV ERROR\n");
                 OHCI_SET_BM(td.flags, TD_CC, OHCI_CC_DEVICENOTRESPONDING);
+                break;
             case USB_RET_NAK:
                 DPRINTF("usb-ohci: got NAK\n");
                 return 1;