staging: comedi: multiq3: tidy up register map defines

For auesthetics, rename the register map defines. Convert the offset
values to hex and add some whitespace.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>