commit a9fbbbd7 upstream.

'rx' is not used in this function. Remove it.
Signed-off-by: Sachin Kamat <sachin.kamat@samsung.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
[ kamal: 3.13-stable prereq for 9df56035 iio: adis16400: Fix burst mode ]
Signed-off-by: Kamal Mostafa <kamal@canonical.com>