staging: comedi: addi_apci_1564: fix use of apci1564_reset() to disable DI interrupts

apci1564_cos_insn_config() is currently using apci1564_reset() to disable
digital input interrupts when the configuration operation is
COMEDI_DIGITAL_TRIG_DISABLE.  However, this is incorrect as the device reset
function also resets the registers for the digital outputs, timer, watchdog, and
counters as well.  Replace the reset function call with a direct disabling of
just the digital input interrupts.
Signed-off-by: Chase Southwood <chase.southwood@gmail.com>
Cc: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk.>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/addi_apci_1564.c

@@ -285,7 +285,10 @@ static int apci1564_cos_insn_config(struct comedi_device *dev,
 			devpriv->ctrl = 0;
 			devpriv->mode1 = 0;
 			devpriv->mode2 = 0;
-			apci1564_reset(dev);
+			outl(0x0, devpriv->amcc_iobase + APCI1564_DI_IRQ_REG);
+			inl(devpriv->amcc_iobase + APCI1564_DI_INT_STATUS_REG);
+			outl(0x0, devpriv->amcc_iobase + APCI1564_DI_INT_MODE1_REG);
+			outl(0x0, devpriv->amcc_iobase + APCI1564_DI_INT_MODE2_REG);
 			break;
 		case COMEDI_DIGITAL_TRIG_ENABLE_EDGES:
 			if (devpriv->ctrl != (APCI1564_DI_INT_ENABLE |