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/video/broadwell_igd.c b/drivers/video/broadwell_igd.c
index bc91e7b..94d9470 100644
--- a/drivers/video/broadwell_igd.c
+++ b/drivers/video/broadwell_igd.c
@@ -661,7 +661,7 @@
 
 static int broadwell_igd_probe(struct udevice *dev)
 {
-	struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
+	struct video_uc_platdata *plat = dev_get_uclass_plat(dev);
 	struct video_priv *uc_priv = dev_get_uclass_priv(dev);
 	bool is_broadwell;
 	ulong fbbase;
@@ -756,7 +756,7 @@
 
 static int broadwell_igd_bind(struct udevice *dev)
 {
-	struct video_uc_platdata *uc_plat = dev_get_uclass_platdata(dev);
+	struct video_uc_platdata *uc_plat = dev_get_uclass_plat(dev);
 
 	/* Set the maximum supported resolution */
 	uc_plat->size = 2560 * 1600 * 4;
@@ -782,5 +782,5 @@
 	.bind	= broadwell_igd_bind,
 	.probe	= broadwell_igd_probe,
 	.priv_auto	= sizeof(struct broadwell_igd_priv),
-	.platdata_auto	= sizeof(struct broadwell_igd_plat),
+	.plat_auto	= sizeof(struct broadwell_igd_plat),
 };