irqchip: vt8500: Staticize local symbols

This driver is converted to use IRQCHIP_DECLARE and irqchip_init.
vt8500_handle_irq() and vt8500_irq_init() are only referenced in this file, so
make them static.

Signed-off-by: Axel Lin <[e-mail]>
Acked-by: Tony Prisk <[e-mail]>
Cc: Olof Johansson <[e-mail]>
Link: http://lkml.kernel.org/r/1372995229.4038.1.camel@phoenix
Signed-off-by: Thomas Gleixner <[e-mail]>

drivers/irqchip/irq-vt8500.c

···
 	.xlate = irq_domain_xlate_onecell,
 };
 
-asmlinkage void __exception_irq_entry vt8500_handle_irq(struct pt_regs *regs)
+static asmlinkage
+void __exception_irq_entry vt8500_handle_irq(struct pt_regs *regs)
 {
 	u32 stat, i;
 	int irqnr, virq;
···
 	}
 }
 
-int __init vt8500_irq_init(struct device_node *node, struct device_node *parent)
+static int __init vt8500_irq_init(struct device_node *node,
+				  struct device_node *parent)
 {
 	int irq, i;
 	struct device_node *np = node;