mfd: arizona: Use irq_find_mapping when appropriate

No need to use irq_create_mapping (although there is no issue with
doing so) when we are only looking up an existing mapping. Just to
streamline things a little and make the code a little more clear
change some calls from irq_create_mapping to irq_find_mapping.
Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/mfd/arizona-irq.c

@@ -398,10 +398,10 @@ int arizona_irq_init(struct arizona *arizona)
 err_boot_done:
 	free_irq(arizona->irq, arizona);
 err_main_irq:
-	regmap_del_irq_chip(irq_create_mapping(arizona->virq, 1),
+	regmap_del_irq_chip(irq_find_mapping(arizona->virq, 1),
 			    arizona->irq_chip);
 err_aod:
-	regmap_del_irq_chip(irq_create_mapping(arizona->virq, 0),
+	regmap_del_irq_chip(irq_find_mapping(arizona->virq, 0),
 			    arizona->aod_irq_chip);
 err:
 	return ret;
@@ -413,9 +413,9 @@ int arizona_irq_exit(struct arizona *arizona)
 		free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR),
 			 arizona);
 	free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE), arizona);
-	regmap_del_irq_chip(irq_create_mapping(arizona->virq, 1),
+	regmap_del_irq_chip(irq_find_mapping(arizona->virq, 1),
 			    arizona->irq_chip);
-	regmap_del_irq_chip(irq_create_mapping(arizona->virq, 0),
+	regmap_del_irq_chip(irq_find_mapping(arizona->virq, 0),
 			    arizona->aod_irq_chip);
 	free_irq(arizona->irq, arizona);