staging: comedi: me_daq: add some whitespace to the subdevice init

To improve the readability, add some whitespace to the subdevice
init.
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>