[ARM] locomo: allow cascaded IRQ base to be specified by platforms

Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
diff --git a/arch/arm/mach-sa1100/collie.c b/arch/arm/mach-sa1100/collie.c
index 9982c5c..5d5f330 100644
--- a/arch/arm/mach-sa1100/collie.c
+++ b/arch/arm/mach-sa1100/collie.c
@@ -234,6 +234,10 @@
 	},
 };
 
+static struct locomo_platform_data locomo_info = {
+	.irq_base	= IRQ_BOARD_START,
+};
+
 struct platform_device collie_locomo_device = {
 	.name		= "locomo",
 	.id		= 0,