arm: mxs: add irq_chip-name for GPIO IRQs

Reported-by: NAlexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>
Acked-by: NShawn Guo <shawn.guo@freescale.com>
Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de>

arch/arm/mach-mxs/gpio.c

@@ -182,6 +182,7 @@ static int mxs_gpio_set_wake_irq(u32 irq, u32 enable)
 }
 
 static struct irq_chip gpio_irq_chip = {
+	.name = "mxs gpio",
 	.ack = mxs_gpio_ack_irq,
 	.mask = mxs_gpio_mask_irq,
 	.unmask = mxs_gpio_unmask_irq,