media: videobuf2-dma-sg.c: kvmalloc_array -> kvcalloc

Fixes smatch warning:

drivers/media/common/videobuf2/videobuf2-dma-sg.c:129 vb2_dma_sg_alloc() warn: Please consider using kvcalloc instead
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/common/videobuf2/videobuf2-dma-sg.c

@@ -126,8 +126,7 @@ static void *vb2_dma_sg_alloc(struct vb2_buffer *vb, struct device *dev,
 	 * there is no memory consistency guarantee, hence dma-sg ignores DMA
 	 * attributes passed from the upper layer.
 	 */
-	buf->pages = kvmalloc_array(buf->num_pages, sizeof(struct page *),
-				    GFP_KERNEL | __GFP_ZERO);
+	buf->pages = kvcalloc(buf->num_pages, sizeof(struct page *), GFP_KERNEL);
 	if (!buf->pages)
 		goto fail_pages_array_alloc;