iio:inkern: Fix typo/bug in convert raw to processed.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c
index dca4eed..98ddc32 100644
--- a/drivers/iio/inkern.c
+++ b/drivers/iio/inkern.c
@@ -450,7 +450,7 @@
 	s64 raw64 = raw;
 	int ret;
 
-	ret = iio_channel_read(chan, &offset, NULL, IIO_CHAN_INFO_SCALE);
+	ret = iio_channel_read(chan, &offset, NULL, IIO_CHAN_INFO_OFFSET);
 	if (ret == 0)
 		raw64 += offset;