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>
diff --git a/drivers/net/greth.c b/drivers/net/greth.c
index 3a90430..61fd54d 100644
--- a/drivers/net/greth.c
+++ b/drivers/net/greth.c
@@ -1500,7 +1500,8 @@
 	if (i == 6) {
 		const unsigned char *addr;
 		int len;
-		addr = of_get_property(ofdev->node, "local-mac-address", &len);
+		addr = of_get_property(ofdev->dev.of_node, "local-mac-address",
+					&len);
 		if (addr != NULL && len == 6) {
 			for (i = 0; i < 6; i++)
 				macaddr[i] = (unsigned int) addr[i];