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/gpio/gpio-uclass.c b/drivers/gpio/gpio-uclass.c
index fdb3a45..4eedd4f 100644
--- a/drivers/gpio/gpio-uclass.c
+++ b/drivers/gpio/gpio-uclass.c
@@ -241,7 +241,7 @@
 
 static int gpio_hog_ofdata_to_platdata(struct udevice *dev)
 {
-	struct gpio_hog_data *plat = dev_get_platdata(dev);
+	struct gpio_hog_data *plat = dev_get_plat(dev);
 	const char *nodename;
 	int ret;
 
@@ -272,7 +272,7 @@
 
 static int gpio_hog_probe(struct udevice *dev)
 {
-	struct gpio_hog_data *plat = dev_get_platdata(dev);
+	struct gpio_hog_data *plat = dev_get_plat(dev);
 	struct gpio_hog_priv *priv = dev_get_priv(dev);
 	int ret;