regmap: irq: Clarify error message when we fail to request primary IRQ

Display the name for the chip rather than just the primary IRQ so it is
clearer what exactly has failed.

Signed-off-by: Mark Brown <[e-mail]>

drivers/base/regmap/regmap-irq.c

···
 	ret = request_threaded_irq(irq, NULL, regmap_irq_thread, irq_flags,
 				   chip->name, d);
 	if (ret != 0) {
-		dev_err(map->dev, "Failed to request IRQ %d: %d\n", irq, ret);
+		dev_err(map->dev, "Failed to request IRQ %d for %s: %d\n",
+			irq, chip->name, ret);
 		goto err_domain;
 	}