irqchip/renesas-rzv2h: Drop irqchip from struct rzv2h_icu_priv

Use rzv2h_icu_chip directly on irq_domain_set_hwirq_and_chip() and drop
the global variable irqchip from struct rzv2h_icu_priv.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com>
Reviewed-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/all/20250224131253.134199-4-biju.das.jz@bp.renesas.com

Author: bijudas

drivers/irqchip/irq-renesas-rzv2h.c

@@ -83,13 +83,11 @@
 /**
  * struct rzv2h_icu_priv - Interrupt Control Unit controller private data structure.
  * @base:	Controller's base address
- * @irqchip:	Pointer to struct irq_chip
  * @fwspec:	IRQ firmware specific data
  * @lock:	Lock to serialize access to hardware registers
  */
 struct rzv2h_icu_priv {
 	void __iomem			*base;
-	const struct irq_chip		*irqchip;
 	struct irq_fwspec		fwspec[ICU_NUM_IRQ];
 	raw_spinlock_t			lock;
 };
@@ -390,7 +388,7 @@ static int rzv2h_icu_alloc(struct irq_domain *domain, unsigned int virq, unsigne
 	if (hwirq > (ICU_NUM_IRQ - 1))
 		return -EINVAL;
 
-	ret = irq_domain_set_hwirq_and_chip(domain, virq, hwirq, priv->irqchip,
+	ret = irq_domain_set_hwirq_and_chip(domain, virq, hwirq, &rzv2h_icu_chip,
 					    (void *)(uintptr_t)tint);
 	if (ret)
 		return ret;
@@ -446,8 +444,6 @@ static int rzv2h_icu_init(struct device_node *node, struct device_node *parent)
 		goto put_dev;
 	}
 
-	rzv2h_icu_data->irqchip = &rzv2h_icu_chip;
-
 	rzv2h_icu_data->base = devm_of_iomap(&pdev->dev, pdev->dev.of_node, 0, NULL);
 	if (IS_ERR(rzv2h_icu_data->base)) {
 		ret = PTR_ERR(rzv2h_icu_data->base);