genirq: Remove irq argument from irq flow handlers

Most interrupt flow handlers do not use the irq argument. Those few
which use it can retrieve the irq number from the irq descriptor.

Remove the argument.

Search and replace was done with coccinelle and some extra helper
scripts around it. Thanks to Julia for her help!

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Julia Lawall <Julia.Lawall@lip6.fr>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
diff --git a/drivers/irqchip/irq-bcm7120-l2.c b/drivers/irqchip/irq-bcm7120-l2.c
index d3f9769..61b18ab 100644
--- a/drivers/irqchip/irq-bcm7120-l2.c
+++ b/drivers/irqchip/irq-bcm7120-l2.c
@@ -56,7 +56,7 @@
 	const __be32 *map_mask_prop;
 };
 
-static void bcm7120_l2_intc_irq_handle(unsigned int irq, struct irq_desc *desc)
+static void bcm7120_l2_intc_irq_handle(struct irq_desc *desc)
 {
 	struct bcm7120_l1_intc_data *data = irq_desc_get_handler_data(desc);
 	struct bcm7120_l2_intc_data *b = data->b;