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/misc/p2sb_emul.c b/drivers/misc/p2sb_emul.c
index acdc2c0..642e94f 100644
--- a/drivers/misc/p2sb_emul.c
+++ b/drivers/misc/p2sb_emul.c
@@ -198,7 +198,7 @@
 
 	device_foreach_child(dev, p2sb) {
 		struct p2sb_child_platdata *pplat =
-			 dev_get_parent_platdata(dev);
+			 dev_get_parent_plat(dev);
 
 		log_debug("   - child %s, pid %d, want %d\n", dev->name,
 			  pplat->pid, pid);
@@ -263,7 +263,7 @@
 	.of_match	= sandbox_p2sb_emul_ids,
 	.ops		= &sandbox_p2sb_emul_emul_ops,
 	.priv_auto	= sizeof(struct p2sb_emul_priv),
-	.platdata_auto	= sizeof(struct p2sb_emul_platdata),
+	.plat_auto	= sizeof(struct p2sb_emul_platdata),
 };
 
 static struct pci_device_id sandbox_p2sb_emul_supported[] = {