of: irq: Report individual failures in of_irq_init()

New pr_err(), a copy of preceeding pr_debug(), faciliates debugging.

This change was inspired by a long lasting debugging of the
octeon_irq_init_ciu() which fails completely silently and leaves the
interrupt controller half-way configured which in turn had very non-obvious
effects.
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Link: https://lore.kernel.org/r/20220907121629.54330-1-alexander.sverdlin@nokia.comSigned-off-by: Rob Herring <robh@kernel.org>

drivers/of/irq.c

@@ -592,6 +592,9 @@ void __init of_irq_init(const struct of_device_id *matches)
 			ret = desc->irq_init_cb(desc->dev,
 						desc->interrupt_parent);
 			if (ret) {
+				pr_err("%s: Failed to init %pOF (%p), parent %p\n",
+				       __func__, desc->dev, desc->dev,
+				       desc->interrupt_parent);
 				of_node_clear_flag(desc->dev, OF_POPULATED);
 				kfree(desc);
 				continue;