staging: comedi: call comedi_release_hardware_device() on error
If `comedi_auto_config()` fails after allocating the minor device, call `comedi_release_hardware_device()` instead of `comedi_free_board_minor()` to free the minor device. That's the same call that `comedi_auto_unconfig()` uses, and is slightly safer as it checks the minor device number is still tied to the same hardware device. Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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