dmaengine: mv_xor_v2 : Move spin_lock_bh() to spin_lock()

It is unnecessary to call spin_lock_bh() for that you are already
in a tasklet.

Signed-off-by: Yunbo Yu <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Vinod Koul <[e-mail]>

drivers/dma/mv_xor_v2.c

···
 		dma_run_dependencies(&next_pending_sw_desc->async_tx);
 
 		/* Lock the channel */
-		spin_lock_bh(&xor_dev->lock);
+		spin_lock(&xor_dev->lock);
 
 		/* add the SW descriptor to the free descriptors list */
 		list_add(&next_pending_sw_desc->free_list,
 			 &xor_dev->free_sw_desc);
 
 		/* Release the channel */
-		spin_unlock_bh(&xor_dev->lock);
+		spin_unlock(&xor_dev->lock);
 
 		/* increment the next descriptor */
 		pending_ptr++;