usbip: clean up code in vhci_device_unlink_cleanup

The cleanup code for unlink_tx and unlink_rx lists is almost the same.
So, extract it into a new function and call it for both unlink_rx and
unlink_tx. Also, remove unnecessary log messages.

Signed-off-by: Anirudh Rayabharam <mail@anirudhrb.com>
Link: https://lore.kernel.org/r/20210820190122.16379-3-mail@anirudhrb.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>