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/usb/host/dwc3-of-simple.c b/drivers/usb/host/dwc3-of-simple.c
index 9b1edcd..66b3e96 100644
--- a/drivers/usb/host/dwc3-of-simple.c
+++ b/drivers/usb/host/dwc3-of-simple.c
@@ -64,7 +64,7 @@
 
 static int dwc3_of_simple_probe(struct udevice *dev)
 {
-	struct dwc3_of_simple *simple = dev_get_platdata(dev);
+	struct dwc3_of_simple *simple = dev_get_plat(dev);
 	int ret;
 
 	ret = dwc3_of_simple_clk_init(dev, simple);
@@ -80,7 +80,7 @@
 
 static int dwc3_of_simple_remove(struct udevice *dev)
 {
-	struct dwc3_of_simple *simple = dev_get_platdata(dev);
+	struct dwc3_of_simple *simple = dev_get_plat(dev);
 
 	reset_release_bulk(&simple->resets);