This member of the private data is replicating what the comedi_async
'cur_chan' member is used for. Use that instead and remove the private
data member.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>