staging: comedi: addi_apci_1516: add support for apci1016 board

The apci1016 board can also be supported by this driver. This board is
also a 16 channel dio board with 16 input channels. The apci1016 does
not have the watchdog timer feature of the apci1516 and apci2016.

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>