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/i2c/busses/i2c-ibm_iic.c b/drivers/i2c/busses/i2c-ibm_iic.c
index b1bc6e2..e66dc83 100644
--- a/drivers/i2c/busses/i2c-ibm_iic.c
+++ b/drivers/i2c/busses/i2c-ibm_iic.c
@@ -664,7 +664,7 @@
 static int __devinit iic_request_irq(struct of_device *ofdev,
 				     struct ibm_iic_private *dev)
 {
-	struct device_node *np = ofdev->node;
+	struct device_node *np = ofdev->dev.of_node;
 	int irq;
 
 	if (iic_force_poll)
@@ -695,7 +695,7 @@
 static int __devinit iic_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 ibm_iic_private *dev;
 	struct i2c_adapter *adap;
 	const u32 *freq;