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/block/ide.c b/drivers/block/ide.c
index a766b5c..43a0776 100644
--- a/drivers/block/ide.c
+++ b/drivers/block/ide.c
@@ -940,7 +940,7 @@
 #endif
 {
 #ifdef CONFIG_BLK
-	struct blk_desc *block_dev = dev_get_uclass_platdata(dev);
+	struct blk_desc *block_dev = dev_get_uclass_plat(dev);
 #endif
 	int device = block_dev->devnum;
 	ulong n = 0;
@@ -1067,7 +1067,7 @@
 #endif
 {
 #ifdef CONFIG_BLK
-	struct blk_desc *block_dev = dev_get_uclass_platdata(dev);
+	struct blk_desc *block_dev = dev_get_uclass_plat(dev);
 #endif
 	int device = block_dev->devnum;
 	ulong n = 0;
@@ -1160,7 +1160,7 @@
 #ifdef CONFIG_BLK
 static int ide_blk_probe(struct udevice *udev)
 {
-	struct blk_desc *desc = dev_get_uclass_platdata(udev);
+	struct blk_desc *desc = dev_get_uclass_plat(udev);
 
 	/* fill in device vendor/product/rev strings */
 	strncpy(desc->vendor, ide_dev_desc[desc->devnum].vendor,