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>

drivers/irqchip/irq-sirfsoc.c

@@ -58,7 +58,8 @@ static void __exception_irq_entry sirfsoc_handle_irq(struct pt_regs *regs)
 	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)