sh: intc: Switch to irq_get_nr_irqs()

Use the irq_get_nr_irqs() function instead of the global variable
'nr_irqs'. Prepare for changing 'nr_irqs' from an exported global
variable into a variable with file scope.

Signed-off-by: Bart Van Assche <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Link: https://lore.kernel.org/all/[email protected]

Author: bvanassche

drivers/sh/intc/virq-debugfs.c

@@ -18,6 +18,7 @@
 
 static int intc_irq_xlate_show(struct seq_file *m, void *priv)
 {
+	const unsigned int nr_irqs = irq_get_nr_irqs();
 	int i;
 
 	seq_printf(m, "%-5s  %-7s  %-15s\n", "irq", "enum", "chip name");