irq/of: Fix comment typo for irq_of_parse_and_map

Fix trivial comment typo for irq_of_parse_and_map().

Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index 1264923..1752988 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -28,7 +28,7 @@
 
 /**
  * irq_of_parse_and_map - Parse and map an interrupt into linux virq space
- * @device: Device node of the device whose interrupt is to be mapped
+ * @dev: Device node of the device whose interrupt is to be mapped
  * @index: Index of the interrupt to map
  *
  * This function is a wrapper that chains of_irq_map_one() and