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/mpc8xxx_gpio.c b/drivers/gpio/mpc8xxx_gpio.c
index 6b64fc0..0933b90 100644
--- a/drivers/gpio/mpc8xxx_gpio.c
+++ b/drivers/gpio/mpc8xxx_gpio.c
@@ -185,7 +185,7 @@
 #if CONFIG_IS_ENABLED(OF_CONTROL)
 static int mpc8xxx_gpio_ofdata_to_platdata(struct udevice *dev)
 {
-	struct mpc8xxx_gpio_plat *plat = dev_get_platdata(dev);
+	struct mpc8xxx_gpio_plat *plat = dev_get_plat(dev);
 	struct mpc8xxx_gpio_data *data = dev_get_priv(dev);
 	fdt_addr_t addr;
 	u32 i;
@@ -222,7 +222,7 @@
 static int mpc8xxx_gpio_platdata_to_priv(struct udevice *dev)
 {
 	struct mpc8xxx_gpio_data *priv = dev_get_priv(dev);
-	struct mpc8xxx_gpio_plat *plat = dev_get_platdata(dev);
+	struct mpc8xxx_gpio_plat *plat = dev_get_plat(dev);
 	unsigned long size = plat->size;
 	ulong driver_data = dev_get_driver_data(dev);