dmaengine: imx-sdma: Use GFP_NOWAIT for dma allocations

The memory allocation in DMA callbacks should use GFP_NOWAIT, so
update this one and fix code alignment for this call while at it.
Signed-off-by: NVinod Koul <vkoul@kernel.org>

drivers/dma/imx-sdma.c

@@ -1157,8 +1157,8 @@ static int sdma_alloc_bd(struct sdma_desc *desc)
 {
 	int ret = 0;
 
-	desc->bd = dma_pool_alloc(desc->sdmac->bd_pool, GFP_ATOMIC,
-					&desc->bd_phys);
+	desc->bd = dma_pool_alloc(desc->sdmac->bd_pool, GFP_NOWAIT,
+				  &desc->bd_phys);
 	if (!desc->bd) {
 		ret = -ENOMEM;
 		goto out;