dmaengine: fsl: remove bad channel update

Commit 59cd818 ("dmaengine: fsl: convert tasklets to use new
tasklet_setup() API") broke this driver by not removing the old channel
update method.

Fix this by remove the offending call as channel is queried from
tasklet structure.

Fixes: 59cd818 ("dmaengine: fsl: convert tasklets to use new tasklet_setup() API")
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/20201001164740.178977-1-vkoul@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>

Author: vinodkoul

drivers/dma/fsl_raid.c

@@ -163,8 +163,6 @@ static void fsl_re_dequeue(struct tasklet_struct *t)
 	unsigned int count, oub_count;
 	int found;
 
-	re_chan = dev_get_drvdata((struct device *)data);
-
 	fsl_re_cleanup_descs(re_chan);
 
 	spin_lock_irqsave(&re_chan->desc_lock, flags);