of: Always use 'struct device.of_node' to get device node pointer.

The following structure elements duplicate the information in
'struct device.of_node' and so are being eliminated.  This patch
makes all readers of these elements use device.of_node instead.

(struct of_device *)->node
(struct dev_archdata *)->prom_node (sparc)
(struct dev_archdata *)->of_node (powerpc & microblaze)

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

sound/soc/fsl/mpc8610_hpcd.c

@@ -203,7 +203,7 @@ static struct snd_soc_ops mpc8610_hpcd_ops = {
 static int mpc8610_hpcd_probe(struct of_device *ofdev,
 	const struct of_device_id *match)
 {
-	struct device_node *np = ofdev->node;
+	struct device_node *np = ofdev->dev.of_node;
 	struct device_node *codec_np = NULL;
 	struct device_node *guts_np = NULL;
 	struct device_node *dma_np = NULL;