spi/rockchip: fixup incorrect dma direction setting

Signed-off-by: Addy Ke <addy.ke@rock-chips.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c
index c074360..6321326 100644
--- a/drivers/spi/spi-rockchip.c
+++ b/drivers/spi/spi-rockchip.c
@@ -678,7 +678,7 @@
 		rs->dma_tx.addr = (dma_addr_t)(mem->start + ROCKCHIP_SPI_TXDR);
 		rs->dma_rx.addr = (dma_addr_t)(mem->start + ROCKCHIP_SPI_RXDR);
 		rs->dma_tx.direction = DMA_MEM_TO_DEV;
-		rs->dma_tx.direction = DMA_DEV_TO_MEM;
+		rs->dma_rx.direction = DMA_DEV_TO_MEM;
 
 		master->can_dma = rockchip_spi_can_dma;
 		master->dma_tx = rs->dma_tx.ch;