iio: Switch to irq_domain_create_simple()

irq_domain_add_simple() is going away as being obsolete now. Switch to
the preferred irq_domain_create_simple(). That differs in the first
parameter: It takes more generic struct fwnode_handle instead of struct
device_node. Therefore, of_fwnode_handle() is added around the
parameter.

Note some of the users can likely use dev->fwnode directly instead of
indirect of_fwnode_handle(dev->of_node). But dev->fwnode is not
guaranteed to be set for all, so this has to be investigated on case to
case basis (by people who can actually test with the HW).

[ tglx: Fix up subject prefix ]

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

drivers/iio/adc/stm32-adc-core.c

···
 			return priv->irq[i];
 	}
 
-	priv->domain = irq_domain_add_simple(np, STM32_ADC_MAX_ADCS, 0,
-					     &stm32_adc_domain_ops,
-					     priv);
+	priv->domain = irq_domain_create_simple(of_fwnode_handle(np),
+						STM32_ADC_MAX_ADCS, 0,
+						&stm32_adc_domain_ops,
+						priv);
 	if (!priv->domain) {
 		dev_err(&pdev->dev, "Failed to add irq domain\n");
 		return -ENOMEM;