dmaengine: Remove net_dma_find_channel

Since commit 7bced397510a ("net_dma: simple removal") removed the net_dma
support entirely, net_dma_find_channel has no users left. Remove the function
entirely.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

drivers/dma/dmaengine.c

@@ -355,20 +355,6 @@ struct dma_chan *dma_find_channel(enum dma_transaction_type tx_type)
 }
 EXPORT_SYMBOL(dma_find_channel);
 
-/*
- * net_dma_find_channel - find a channel for net_dma
- * net_dma has alignment requirements
- */
-struct dma_chan *net_dma_find_channel(void)
-{
-	struct dma_chan *chan = dma_find_channel(DMA_MEMCPY);
-	if (chan && !is_dma_copy_aligned(chan->device, 1, 1, 1))
-		return NULL;
-
-	return chan;
-}
-EXPORT_SYMBOL(net_dma_find_channel);
-
 /**
  * dma_issue_pending_all - flush all pending operations across all channels
  */

include/linux/dmaengine.h

@@ -1090,7 +1090,6 @@ void dma_async_device_unregister(struct dma_device *device);
 void dma_run_dependencies(struct dma_async_tx_descriptor *tx);
 struct dma_chan *dma_get_slave_channel(struct dma_chan *chan);
 struct dma_chan *dma_get_any_slave_channel(struct dma_device *device);
-struct dma_chan *net_dma_find_channel(void);
 #define dma_request_channel(mask, x, y) __dma_request_channel(&(mask), x, y)
 #define dma_request_slave_channel_compat(mask, x, y, dev, name) \
 	__dma_request_slave_channel_compat(&(mask), x, y, dev, name)