The is_slave_direction helps to check if the transfer type is slave.
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: NViresh Kumar <viresh.kumar@linaro.org>
Acked-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: NVinod Koul <vinod.koul@intel.com>