IA64: fix swiotlb alloc_coherent for non DMA_64BIT_MASK devices, fix

Because dma_alloc_coherent() always required DMA zone even if DMA is
NOT necessary, FUJITA Tomonori posted a patch to fix it:

  http://marc.info/?l=linux-ia64&m=123314730923356&w=2

However, this fix needs one more patch to fix completely.
I tested and confirmed dma_alloc_coherent() returns
correct zone after applied following patch.
Signed-off-by: NYasunori Goto <y-goto@jp.fujitsu.com>
Acked-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

arch/ia64/include/asm/dma-mapping.h

@@ -24,7 +24,7 @@ static inline void *dma_alloc_coherent(struct device *dev, size_t size,
 				       dma_addr_t *daddr, gfp_t gfp)
 {
 	struct dma_map_ops *ops = platform_dma_get_ops(dev);
-	return ops->alloc_coherent(dev, size, daddr, gfp | GFP_DMA);
+	return ops->alloc_coherent(dev, size, daddr, gfp);
 }
 
 static inline void dma_free_coherent(struct device *dev, size_t size,