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/serial/of_serial.c b/drivers/serial/of_serial.c
index 4abfebd..2953980 100644
--- a/drivers/serial/of_serial.c
+++ b/drivers/serial/of_serial.c
@@ -31,7 +31,7 @@
 					int type, struct uart_port *port)
 {
 	struct resource resource;
-	struct device_node *np = ofdev->node;
+	struct device_node *np = ofdev->dev.of_node;
 	const unsigned int *clk, *spd;
 	const u32 *prop;
 	int ret, prop_size;
@@ -88,7 +88,7 @@
 	int port_type;
 	int ret;
 
-	if (of_find_property(ofdev->node, "used-by-rtas", NULL))
+	if (of_find_property(ofdev->dev.of_node, "used-by-rtas", NULL))
 		return -EBUSY;
 
 	info = kmalloc(sizeof(*info), GFP_KERNEL);