[media] OMAP2: V4L2: Remove GFP_DMA allocation as ZONE_DMA is not configured on OMAP

Remove GFP_DMA from the __get_free_pages() call from omap24xxcam as ZONE_DMA
is not configured on OMAP. Earlier the page allocator used to return a page
from ZONE_NORMAL even when GFP_DMA is passed and CONFIG_ZONE_DMA is disabled.
As a result of commit a197b59ae6e8bee56fcef37ea2482dc08414e2ac, page allocator
returns null in such a scenario with a warning emitted to kernel log.

Signed-off-by: Amber Jain <amber@ti.com>
Acked-by: Sakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/omap24xxcam.c

@@ -308,11 +308,11 @@ static int omap24xxcam_vbq_alloc_mmap_buffer(struct videobuf_buffer *vb)
 			order--;
 
 		/* try to allocate as many contiguous pages as possible */
-		page = alloc_pages(GFP_KERNEL | GFP_DMA, order);
+		page = alloc_pages(GFP_KERNEL, order);
 		/* if allocation fails, try to allocate smaller amount */
 		while (page == NULL) {
 			order--;
-			page = alloc_pages(GFP_KERNEL | GFP_DMA, order);
+			page = alloc_pages(GFP_KERNEL, order);
 			if (page == NULL && !order) {
 				err = -ENOMEM;
 				goto out;