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/mmc/host/of_mmc_spi.c b/drivers/mmc/host/of_mmc_spi.c
index bb6cc54..1247e5d 100644
--- a/drivers/mmc/host/of_mmc_spi.c
+++ b/drivers/mmc/host/of_mmc_spi.c
@@ -64,7 +64,7 @@
 struct mmc_spi_platform_data *mmc_spi_get_pdata(struct spi_device *spi)
 {
 	struct device *dev = &spi->dev;
-	struct device_node *np = dev_archdata_get_node(&dev->archdata);
+	struct device_node *np = dev->of_node;
 	struct of_mmc_spi *oms;
 	const u32 *voltage_ranges;
 	int num_ranges;
@@ -135,7 +135,7 @@
 void mmc_spi_put_pdata(struct spi_device *spi)
 {
 	struct device *dev = &spi->dev;
-	struct device_node *np = dev_archdata_get_node(&dev->archdata);
+	struct device_node *np = dev->of_node;
 	struct of_mmc_spi *oms = to_of_mmc_spi(dev);
 	int i;