irqchip: sirf: fix one minor checkpatch issue

fix "line line over 80 characters" for the below:
static int __init sirfsoc_irq_init(struct device_node *np, struct device_node *parent)

the users of the codes - key customers really care about that.

Signed-off-by: Bin Shi <Bin.Shi@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
diff --git a/drivers/irqchip/irq-sirfsoc.c b/drivers/irqchip/irq-sirfsoc.c
index 581eefe..5e54f6d 100644
--- a/drivers/irqchip/irq-sirfsoc.c
+++ b/drivers/irqchip/irq-sirfsoc.c
@@ -58,7 +58,8 @@
 	handle_IRQ(irqnr, regs);
 }
 
-static int __init sirfsoc_irq_init(struct device_node *np, struct device_node *parent)
+static int __init sirfsoc_irq_init(struct device_node *np,
+	struct device_node *parent)
 {
 	void __iomem *base = of_iomap(np, 0);
 	if (!base)