dmaengine: at_hdmac: Substitute kzalloc with kmalloc

All members of the structure are initialized below in the function,
there is no need to use kzalloc.

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Link: https://lore.kernel.org/r/20200123140237.125799-1-tudor.ambarus@microchip.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

drivers/dma/at_hdmac.c

@@ -1671,7 +1671,7 @@ static struct dma_chan *at_dma_xlate(struct of_phandle_args *dma_spec,
 	dma_cap_zero(mask);
 	dma_cap_set(DMA_SLAVE, mask);
 
-	atslave = kzalloc(sizeof(*atslave), GFP_KERNEL);
+	atslave = kmalloc(sizeof(*atslave), GFP_KERNEL);
 	if (!atslave)
 		return NULL;