staging: comedi: addi_apci_2032: move i_APCI2032_ConfigDigitalOutput()

For aesthetic reasons, move this function.

This function has nothing to do with the digital outputs. It's used
to enable the interrupt sources that the board can generate.

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>