spi: bcm2835: Drop assignment of dma_slave_config direction

The BCM2835 SPI driver still sets the "direction" member in struct
dma_slave_config even though it was deprecated five years ago with
commit d9ff958b ("dmaengine: Mark the struct dma_slave_config
direction field deprecated") and is no longer evaluated by the BCM2835
DMA driver since commit 00648f4d ("dmaengine: bcm2835: remove
dma_slave_config direction usage").

Drop the superfluous assignment.
No functional change intended.
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Cc: Frank Pavlic <f.pavlic@kunbus.de>
Cc: Martin Sperl <kernel@martin.sperl.org>
Cc: Noralf Trønnes <noralf@tronnes.org>
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-bcm2835.c

@@ -729,7 +729,6 @@ static void bcm2835_dma_init(struct spi_controller *ctlr, struct device *dev)
 	}
 
 	/* configure DMAs */
-	slave_config.direction = DMA_MEM_TO_DEV;
 	slave_config.dst_addr = (u32)(dma_reg_base + BCM2835_SPI_FIFO);
 	slave_config.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
 
@@ -737,7 +736,6 @@ static void bcm2835_dma_init(struct spi_controller *ctlr, struct device *dev)
 	if (ret)
 		goto err_config;
 
-	slave_config.direction = DMA_DEV_TO_MEM;
 	slave_config.src_addr = (u32)(dma_reg_base + BCM2835_SPI_FIFO);
 	slave_config.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;