spmi: pmic-arb: Pass the correct of_node to irq_domain_add_tree

Currently, irqchips for all of the subnodes (which represent a given
bus master) point to the parent wrapper node. This is no bueno, as
no interrupts arrive, ever (because nothing references that node).

Fix that by passing a reference to the respective master's of_node.

Worth noting, this is a NOP for devices with only a single master
described.

Signed-off-by: Konrad Dybcio <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Reviewed-by: Abel Vesa <[e-mail]>
Tested-by: Dmitry Baryshkov <[e-mail]>
Reviewed-by: Dmitry Baryshkov <[e-mail]>
Fixes: 02922ccbb330 ("spmi: pmic-arb: Register controller for bus instead of arbiter")
Cc: [e-mail]
Signed-off-by: Stephen Boyd <[e-mail]>
Reviewed-by: Bjorn Andersson <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/spmi/spmi-pmic-arb.c

···
 
 	dev_dbg(&pdev->dev, "adding irq domain for bus %d\n", bus_index);
 
-	bus->domain = irq_domain_add_tree(dev->of_node,
-					  &pmic_arb_irq_domain_ops, bus);
+	bus->domain = irq_domain_add_tree(node, &pmic_arb_irq_domain_ops, bus);
 	if (!bus->domain) {
 		dev_err(&pdev->dev, "unable to create irq_domain\n");
 		return -ENOMEM;