Another ABI change for newer kernels. iio_kfifo_allocate()

[cheako]

Index: linux-4.1.3/drivers/iio/imu/inv_mpu/inv_mpu_ring.c
===================================================================
--- linux-4.1.3.orig/drivers/iio/imu/inv_mpu/inv_mpu_ring.c
+++ linux-4.1.3/drivers/iio/imu/inv_mpu/inv_mpu_ring.c
@@ -1692,7 +1692,7 @@ int inv_mpu_configure_ring(struct iio_de
    struct inv_mpu_state *st = iio_priv(indio_dev);
    struct iio_buffer *ring;

-   ring = iio_kfifo_allocate(indio_dev);
+   ring = iio_kfifo_allocate();
    if (!ring)
        return -ENOMEM;
    indio_dev->buffer = ring;