pinctrl: renesas: rzg2l: Enhance driver to support interrupt affinity setting

Implement irq_set_affinity callback so that we can set affinity
for GPIO IRQs.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20231011195923.67404-1-prabhakar.mahadev-lad.rj@bp.renesas.comSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

drivers/pinctrl/renesas/pinctrl-rzg2l.c

@@ -1576,6 +1576,7 @@ static const struct irq_chip rzg2l_gpio_irqchip = {
 	.irq_set_type = rzg2l_gpio_irq_set_type,
 	.irq_eoi = rzg2l_gpio_irqc_eoi,
 	.irq_print_chip = rzg2l_gpio_irq_print_chip,
+	.irq_set_affinity = irq_chip_set_affinity_parent,
 	.flags = IRQCHIP_IMMUTABLE,
 	GPIOCHIP_IRQ_RESOURCE_HELPERS,
 };