[IA64-SGI] sn_dma_alloc_coherent should use gfp flags

Takashi helped us track down a bad page state bug we thought was coming
from alsa.  It turns out we weren't paying attention to the gfp flags
that were passed in to sn_dma_alloc_coherent().

From: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Edwards <edwardsg@sgi.com>
Signed-off-by: Mark Maule <maule@sgi.com>
Signed-off-by: Jes Sorensen <jes@sgi.com>

arch/ia64/sn/pci/pci_dma.c

@@ -90,14 +90,14 @@ void *sn_dma_alloc_coherent(struct device *dev, size_t size,
 	 */
 	node = pcibus_to_node(pdev->bus);
 	if (likely(node >=0)) {
-		struct page *p = alloc_pages_node(node, GFP_ATOMIC, get_order(size));
+		struct page *p = alloc_pages_node(node, flags, get_order(size));
 
 		if (likely(p))
 			cpuaddr = page_address(p);
 		else
 			return NULL;
 	} else
-		cpuaddr = (void *)__get_free_pages(GFP_ATOMIC, get_order(size));
+		cpuaddr = (void *)__get_free_pages(flags, get_order(size));
 
 	if (unlikely(!cpuaddr))
 		return NULL;