powerpc: Drop archdata numa_node

Use the struct device's numa_node instead; use accessor functions
to get/set numa_node.

Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c
index e06420a..ef92e71 100644
--- a/arch/powerpc/platforms/cell/iommu.c
+++ b/arch/powerpc/platforms/cell/iommu.c
@@ -556,11 +556,11 @@
 	 * node's iommu. We -might- do something smarter later though it may
 	 * never be necessary
 	 */
-	iommu = cell_iommu_for_node(archdata->numa_node);
+	iommu = cell_iommu_for_node(dev_to_node(dev));
 	if (iommu == NULL || list_empty(&iommu->windows)) {
 		printk(KERN_ERR "iommu: missing iommu for %s (node %d)\n",
 		       archdata->of_node ? archdata->of_node->full_name : "?",
-		       archdata->numa_node);
+		       dev_to_node(dev));
 		return NULL;
 	}
 	window = list_entry(iommu->windows.next, struct iommu_window, list);
@@ -577,7 +577,7 @@
 		return iommu_alloc_coherent(dev, cell_get_iommu_table(dev),
 					    size, dma_handle,
 					    device_to_mask(dev), flag,
-					    dev->archdata.numa_node);
+					    dev_to_node(dev));
 	else
 		return dma_direct_ops.alloc_coherent(dev, size, dma_handle,
 						     flag);
diff --git a/arch/powerpc/platforms/ps3/system-bus.c b/arch/powerpc/platforms/ps3/system-bus.c
index 280ee88..a789bf58c 100644
--- a/arch/powerpc/platforms/ps3/system-bus.c
+++ b/arch/powerpc/platforms/ps3/system-bus.c
@@ -762,7 +762,7 @@
 	};
 
 	dev->core.archdata.of_node = NULL;
-	dev->core.archdata.numa_node = 0;
+	set_dev_node(&dev->core, 0);
 
 	pr_debug("%s:%d add %s\n", __func__, __LINE__, dev->core.bus_id);