mx31ads: Provide a name for EXPIO interrupt chip

This makes it a bit more obvious in genirq diagnostics that they
aren't handled by the i.MX interrupt controller.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
diff --git a/arch/arm/mach-mx3/mx31ads.c b/arch/arm/mach-mx3/mx31ads.c
index 609d402..e205456 100644
--- a/arch/arm/mach-mx3/mx31ads.c
+++ b/arch/arm/mach-mx3/mx31ads.c
@@ -173,6 +173,7 @@
 }
 
 static struct irq_chip expio_irq_chip = {
+	.name = "EXPIO(CPLD)",
 	.ack = expio_ack_irq,
 	.mask = expio_mask_irq,
 	.unmask = expio_unmask_irq,