iio: Fix inkern remove incorrect put of device

The device_get is after this point so on error we should not be
removing it.

Signed-off-by: Jonathan Cameron <jic23@kernel.org>
diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c
index 9a46ca6..e2aded0 100644
--- a/drivers/iio/inkern.c
+++ b/drivers/iio/inkern.c
@@ -193,7 +193,6 @@
 						c->map->adc_channel_label);
 		if (chans[mapind].channel == NULL) {
 			ret = -EINVAL;
-			iio_device_put(chans[mapind].indio_dev);
 			goto error_free_chans;
 		}
 		iio_device_get(chans[mapind].indio_dev);