irqchip/ftintc010: Mark all function static

Two functions were always global but never had any callers
outside of this file:

drivers/irqchip/irq-ftintc010.c:128:39: error: no previous prototype for 'ft010_irqchip_handle_irq'
drivers/irqchip/irq-ftintc010.c:165:12: error: no previous prototype for 'ft010_of_init_irq'

Fixes: b4d3053c8ce9 ("irqchip: Add a driver for Cortina Gemini")
Signed-off-by: Arnd Bergmann <[e-mail]>
Reviewed-by: Linus Walleij <[e-mail]>
Signed-off-by: Marc Zyngier <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/irqchip/irq-ftintc010.c

···
 /* Local static for the IRQ entry call */
 static struct ft010_irq_data firq;
 
-asmlinkage void __exception_irq_entry ft010_irqchip_handle_irq(struct pt_regs *regs)
+static asmlinkage void __exception_irq_entry ft010_irqchip_handle_irq(struct pt_regs *regs)
 {
 	struct ft010_irq_data *f = &firq;
 	int irq;
···
 	.xlate = irq_domain_xlate_onetwocell,
 };
 
-int __init ft010_of_init_irq(struct device_node *node,
+static int __init ft010_of_init_irq(struct device_node *node,
 			      struct device_node *parent)
 {
 	struct ft010_irq_data *f = &firq;