gpio: idt3243x: Switch to irq_find_mapping()

irq_linear_revmap() is deprecated, so remove all its uses and supersede
them by an identical call to irq_find_mapping().

[ tglx: Fix up subject prefix ]

Signed-off-by: Jiri Slaby (SUSE) <[e-mail]>
Signed-off-by: Thomas Gleixner <[e-mail]>
Reviewed-by: Linus Walleij <[e-mail]>
Link: https://lore.kernel.org/all/[e-mail]

drivers/gpio/gpio-idt3243x.c

···
 	pending = readl(ctrl->pic + IDT_PIC_IRQ_PEND);
 	pending &= ~ctrl->mask_cache;
 	for_each_set_bit(bit, &pending, gc->ngpio) {
-		virq = irq_linear_revmap(gc->irq.domain, bit);
+		virq = irq_find_mapping(gc->irq.domain, bit);
 		if (virq)
 			generic_handle_irq(virq);
 	}