staging: comedi: addi_apci_1564: define the APCI1564_DO_IRQ_REG bits

Define the bits in this register.
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>

drivers/staging/comedi/drivers/addi_apci_1564.c

@@ -87,6 +87,7 @@
 #define APCI1564_DO_INT_STATUS_CC		BIT(1)
 #define APCI1564_DO_INT_STATUS_VCC		BIT(0)
 #define APCI1564_DO_IRQ_REG			0x20
+#define APCI1564_DO_IRQ_INTR			BIT(0)
 #define APCI1564_WDOG_REG			0x24
 #define APCI1564_WDOG_RELOAD_REG		0x28
 #define APCI1564_WDOG_TIMEBASE_REG		0x2c