dmaengine: k3dma: remove device_alloc_chan_resources handler

Now that device_alloc_chan_resources handler in not mandatory, remove dummy
implementations

Acked-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

drivers/dma/k3dma.c

@@ -313,11 +313,6 @@ static void k3_dma_tasklet(unsigned long arg)
 	}
 }
 
-static int k3_dma_alloc_chan_resources(struct dma_chan *chan)
-{
-	return 0;
-}
-
 static void k3_dma_free_chan_resources(struct dma_chan *chan)
 {
 	struct k3_dma_chan *c = to_k3_chan(chan);
@@ -728,7 +723,6 @@ static int k3_dma_probe(struct platform_device *op)
 	dma_cap_set(DMA_SLAVE, d->slave.cap_mask);
 	dma_cap_set(DMA_MEMCPY, d->slave.cap_mask);
 	d->slave.dev = &op->dev;
-	d->slave.device_alloc_chan_resources = k3_dma_alloc_chan_resources;
 	d->slave.device_free_chan_resources = k3_dma_free_chan_resources;
 	d->slave.device_tx_status = k3_dma_tx_status;
 	d->slave.device_prep_dma_memcpy = k3_dma_prep_memcpy;