staging: comedi: drivers/*.c: remove unnecessary blank lines

Blank lines are not needed before a close brace '}' or after an
open brace '{'. Also remove any multiple blank lines.

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>