csky: don't use GFP_DMA in atomic_pool_init

csky does not implement ZONE_DMA, which means passing GFP_DMA is a no-op.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Guo Ren <ren_guo@c-sky.com>
diff --git a/arch/csky/mm/dma-mapping.c b/arch/csky/mm/dma-mapping.c
index 85437b2..ad40469 100644
--- a/arch/csky/mm/dma-mapping.c
+++ b/arch/csky/mm/dma-mapping.c
@@ -35,7 +35,7 @@
 	if (!atomic_pool)
 		BUG();
 
-	page = alloc_pages(GFP_KERNEL | GFP_DMA, get_order(size));
+	page = alloc_pages(GFP_KERNEL, get_order(size));
 	if (!page)
 		BUG();