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/power/regulator/fan53555.c b/drivers/power/regulator/fan53555.c
index 70aeef7..709cc63 100644
--- a/drivers/power/regulator/fan53555.c
+++ b/drivers/power/regulator/fan53555.c
@@ -103,8 +103,8 @@
 static int fan53555_regulator_ofdata_to_platdata(struct udevice *dev)
 {
 	struct fan53555_platdata *dev_pdata = dev_get_platdata(dev);
-	struct dm_regulator_uclass_platdata *uc_pdata =
-		dev_get_uclass_platdata(dev);
+	struct dm_regulator_uclass_plat *uc_pdata =
+		dev_get_uclass_plat(dev);
 	u32 sleep_vsel;
 
 	/* This is a buck regulator */
@@ -239,7 +239,7 @@
 	.id = UCLASS_REGULATOR,
 	.ops = &fan53555_regulator_ops,
 	.ofdata_to_platdata = fan53555_regulator_ofdata_to_platdata,
-	.platdata_auto	= sizeof(struct fan53555_platdata),
+	.plat_auto	= sizeof(struct fan53555_platdata),
 	.priv_auto	= sizeof(struct fan53555_priv),
 	.probe = fan53555_probe,
 };