[ARM] Fix missed initialisers/missing comma

Fix the broken initialisers missed by the recent IRQ patch.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-ixp2000/core.c b/arch/arm/mach-ixp2000/core.c
index 781d10a..098c817 100644
--- a/arch/arm/mach-ixp2000/core.c
+++ b/arch/arm/mach-ixp2000/core.c
@@ -382,7 +382,7 @@
 static struct irqchip ixp2000_GPIO_irq_chip = {
 	.ack		= ixp2000_GPIO_irq_mask_ack,
 	.mask		= ixp2000_GPIO_irq_mask,
-	.unmask		= ixp2000_GPIO_irq_unmask
+	.unmask		= ixp2000_GPIO_irq_unmask,
 	.set_type	= ixp2000_GPIO_irq_type,
 };