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/of/of_i2c.c b/drivers/of/of_i2c.c
index e690a2a..604ba96 100644
--- a/drivers/of/of_i2c.c
+++ b/drivers/of/of_i2c.c
@@ -69,7 +69,7 @@
 
 static int of_dev_node_match(struct device *dev, void *data)
 {
-        return dev_archdata_get_node(&dev->archdata) == data;
+        return dev->of_node == data;
 }
 
 /* must call put_device() when done with returned i2c_client device */