[PATCH -next] iio: isl29018: fix to return error or 0 in isl29018_write_raw()

From: Wei Yongjun <redacted>

We had assigned the return value to 'ret' but ignored it when
return from isl29018_write_raw(), it's better to return 'ret'
instead of 0.

dpatch engine is used to auto generate this patch.
(https://github.com/weiyj/dpatch)

Signed-off-by: Wei Yongjun <redacted>
---
 drivers/staging/iio/light/isl29018.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/iio/light/isl29018.c b/drivers/staging/iio/light/isl29018.c
index 3b03f6f..1d5b294 100644
--- a/drivers/staging/iio/light/isl29018.c
+++ b/drivers/staging/iio/light/isl29018.c

@@ -356,7 +356,7 @@ static int isl29018_write_raw(struct iio_dev *indio_dev,
 	}
 	mutex_unlock(&chip->lock);
 
-	return 0;
+	return ret;
 }
 
 static int isl29018_read_raw(struct iio_dev *indio_dev,