irqchip/ativic32: Constify irq_domain_ops

This is passed to irq_domain_add_linear(), which accepts a pointer
to a const structure.

Signed-off-by: Masahiro Yamada <[e-mail]>
Signed-off-by: Marc Zyngier <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/irqchip/irq-ativic32.c

···
 	return 0;
 }
 
-static struct irq_domain_ops ativic32_ops = {
+static const struct irq_domain_ops ativic32_ops = {
 	.map = ativic32_irq_domain_map,
 	.xlate = irq_domain_xlate_onecell
 };