dm: treewide: Rename dev_get_platdata() to dev_get_plat()

Rename this to be consistent with the change from 'platdata'.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/mmc/ftsdc010_mci.c b/drivers/mmc/ftsdc010_mci.c
index 196c527..1c31874 100644
--- a/drivers/mmc/ftsdc010_mci.c
+++ b/drivers/mmc/ftsdc010_mci.c
@@ -424,7 +424,7 @@
 
 static int ftsdc010_mmc_probe(struct udevice *dev)
 {
-	struct ftsdc010_plat *plat = dev_get_platdata(dev);
+	struct ftsdc010_plat *plat = dev_get_plat(dev);
 	struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
 	struct ftsdc_priv *priv = dev_get_priv(dev);
 	struct ftsdc010_chip *chip = &priv->chip;
@@ -459,7 +459,7 @@
 
 int ftsdc010_mmc_bind(struct udevice *dev)
 {
-	struct ftsdc010_plat *plat = dev_get_platdata(dev);
+	struct ftsdc010_plat *plat = dev_get_plat(dev);
 
 	return mmc_bind(dev, &plat->mmc, &plat->cfg);
 }