irqchip/renesas-rzg2l: Simplify checks in rzg2l_irqc_common_init()

Both devm_pm_runtime_enable() and pm_runtime_resume_and_get()
return 0 or a negative error code.

Simplify the checks done with their respective return values
accordingly.

Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250212182034.366167-7-fabrizio.castro.jz@renesas.com

drivers/irqchip/irq-renesas-rzg2l.c

@@ -565,11 +565,11 @@ static int rzg2l_irqc_common_init(struct device_node *node, struct device_node *
 	}
 
 	ret = devm_pm_runtime_enable(dev);
-	if (ret < 0)
+	if (ret)
 		return dev_err_probe(dev, ret, "devm_pm_runtime_enable failed: %d\n", ret);
 
 	ret = pm_runtime_resume_and_get(dev);
-	if (ret < 0)
+	if (ret)
 		return dev_err_probe(dev, ret, "pm_runtime_resume_and_get failed: %d\n", ret);
 
 	raw_spin_lock_init(&rzg2l_irqc_data->lock);