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[OHCI] OHCI_CC_DEVICENOTRESPONDING not set when transferring to a disconnected device
Description of problem:
If a USB device is disconnected and is cleaned up by qemu, subsequent transfers to that device address are ignored. On a real OHCI controller `OHCI_CC_DEVICENOTRESPONDING` bit is set and is reported as an error to the host.
qemu attempts to set it here https://github.com/qemu/qemu/blob/ffd454c67e38cc6df792733ebc5d967eee28ac0d/hw/usb/hcd-ohci.c#L795 which would work fine on a valid device handle.
However this check https://github.com/qemu/qemu/blob/ffd454c67e38cc6df792733ebc5d967eee28ac0d/hw/usb/hcd-ohci.c#L975 leaves early if no device handle is found so the error code is never set.
Fix is to set `OHCI_CC_DEVICENOTRESPONDING` if `ohci_find_device` fails before returning.
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