ARM: ecard: get rid of NO_IRQ madness

Get rid of the NO_IRQ madness from Acorn expansion card handling code.
Thankfully, are relatively few users of this here, and so it's easy to
audit.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/drivers/scsi/arm/arxescsi.c b/drivers/scsi/arm/arxescsi.c
index a750aa7..2a28b4a 100644
--- a/drivers/scsi/arm/arxescsi.c
+++ b/drivers/scsi/arm/arxescsi.c
@@ -305,7 +305,7 @@
 	info->base = base;
 
 	info->info.scsi.io_base		= base + 0x2000;
-	info->info.scsi.irq		= NO_IRQ;
+	info->info.scsi.irq		= 0;
 	info->info.scsi.dma		= NO_DMA;
 	info->info.scsi.io_shift	= 5;
 	info->info.ifcfg.clockrate	= 24; /* MHz */