staging: comedi: rtd520: cleanup the LAS0_* defines

Fixes all the > 80 char checkpatch.pl issues with these defines.

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>