staging: comedi: dt3000: add a simple dev_info() when attached
When the board is finished with the attach output a simple dev_info()
message.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>