iio:light:stk3310: adjust indentation

Adjust some indentation issues as spotted by checkpatch.pl --strict

Signed-off-by: Hartmut Knaack <knaack.h@gmx.de>
Reviewed-by: Tiberiu Breana <tiberiu.a.breana@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
diff --git a/drivers/iio/light/stk3310.c b/drivers/iio/light/stk3310.c
index e5e0b04..25c6a71 100644
--- a/drivers/iio/light/stk3310.c
+++ b/drivers/iio/light/stk3310.c
@@ -385,7 +385,7 @@
 			ret = regmap_field_write(data->reg_ps_it, index);
 		if (ret < 0)
 			dev_err(&data->client->dev,
-					"sensor configuration failed\n");
+				"sensor configuration failed\n");
 		mutex_unlock(&data->lock);
 		return ret;
 
@@ -402,7 +402,7 @@
 			ret = regmap_field_write(data->reg_ps_gain, index);
 		if (ret < 0)
 			dev_err(&data->client->dev,
-					"sensor configuration failed\n");
+				"sensor configuration failed\n");
 		mutex_unlock(&data->lock);
 		return ret;
 	}
@@ -645,7 +645,7 @@
 						STK3310_EVENT, indio_dev);
 		if (ret < 0) {
 			dev_err(&client->dev, "request irq %d failed\n",
-					client->irq);
+				client->irq);
 			goto err_standby;
 		}
 	}