dmaengine: sprd: stop referencing config->slave_id

It appears that the code that reads the slave_id from the channel config
was copied incorrectly from other drivers. Nothing ever sets this field
on platforms that use this driver, so remove the reference.

Reviewed-by: Baolin Wang <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>
Acked-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>

Author: arndb

drivers/dma/sprd-dma.c

@@ -795,9 +795,6 @@ static int sprd_dma_fill_desc(struct dma_chan *chan,
 		return dst_datawidth;
 	}
 
-	if (slave_cfg->slave_id)
-		schan->dev_id = slave_cfg->slave_id;
-
 	hw->cfg = SPRD_DMA_DONOT_WAIT_BDONE << SPRD_DMA_WAIT_BDONE_OFFSET;
 
 	/*