irqchip/stm32-exti: Add domain translate function

Domain translate function is needed to recover irq
configuration parameters from DT node

Fixes: 927abfc ("irqchip/stm32: Add stm32mp1 support with hierarchy domain")
Signed-off-by: Loic Pallardy <loic.pallardy@st.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

drivers/irqchip/irq-stm32-exti.c

@@ -822,6 +822,7 @@ static int __init stm32_exti_init(const struct stm32_exti_drv_data *drv_data,
 static const struct irq_domain_ops stm32_exti_h_domain_ops = {
 	.alloc	= stm32_exti_h_domain_alloc,
 	.free	= irq_domain_free_irqs_common,
+	.xlate = irq_domain_xlate_twocell,
 };
 
 static int