dm: treewide: Rename 'platdata' variables to just 'plat'

We use 'priv' for private data but often use 'platdata' for platform data.
We can't really use 'pdata' since that is ambiguous (it could mean private
or platform data).

Rename some of the latter variables to end with 'plat' for consistency.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/w1-eeprom/w1-eeprom-uclass.c b/drivers/w1-eeprom/w1-eeprom-uclass.c
index d515b4c..97a9d43 100644
--- a/drivers/w1-eeprom/w1-eeprom-uclass.c
+++ b/drivers/w1-eeprom/w1-eeprom-uclass.c
@@ -53,7 +53,7 @@
 		if (dev_get_driver_data(dev) == family) {
 			struct w1_device *w1;
 
-			w1 = dev_get_parent_platdata(dev);
+			w1 = dev_get_parent_plat(dev);
 			if (w1->id) /* device already in use */
 				continue;
 			w1->id = id;
@@ -70,7 +70,7 @@
 
 int w1_eeprom_get_id(struct udevice *dev, u64 *id)
 {
-	struct w1_device *w1 = dev_get_parent_platdata(dev);
+	struct w1_device *w1 = dev_get_parent_plat(dev);
 
 	if (!w1)
 		return -ENODEV;