Rename the local function `cleanup_device()` to
`comedi_device_detach_cleanup()`. It is only called from the
`comedi_device_detach()` function and that is called from
`comedi_device_cleanup()` and other places. The more specific function
name seems less confusing.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>