irqchip/eznps: Drop pointless static qualifier in nps400_of_init()

There is no need to have the 'struct irq_domain *nps400_root_domain'
variable static since new value is always assigned before use.

Fixes: 44df427c894a ("irqchip: add nps Internal and external irqchips")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Link: http://lkml.kernel.org/r/1476714417-12095-1-git-send-email-weiyj.lk@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

drivers/irqchip/irq-eznps.c

@@ -135,7 +135,7 @@ static const struct irq_domain_ops nps400_irq_ops = {
 static int __init nps400_of_init(struct device_node *node,
 				 struct device_node *parent)
 {
-	static struct irq_domain *nps400_root_domain;
+	struct irq_domain *nps400_root_domain;
 
 	if (parent) {
 		pr_err("DeviceTree incore ic not a root irq controller\n");