dma_alloc_coherent already zeroes out memory, so memset is not needed.
Signed-off-by: NWang Qing <wangqing@vivo.com>
Reviewed-by: NPawel Laszczak <pawell@cadence.com>
Acked-by: NPawel Laszczak <pawell@cadence.com>
Signed-off-by: NPeter Chen <peter.chen@kernel.org>