staging: comedi: ni_65xx: cleanup non-recurring register map defines

Rename the CamelCase defines used for the non-recurring registers.

Define all the non-recurring registers and bits.

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>