staging: comedi: addi_apci_1710: remove 'interrupt' from boardinfo

Only one board type is supported by this driver. Remove the 'interrupt'
field from the boardinfo and just call the function directly in
v_ADDI_Interrupt().

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>