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/misc/microchip_flexcom.c b/drivers/misc/microchip_flexcom.c
index 1d9ca82..a95d9cb 100644
--- a/drivers/misc/microchip_flexcom.c
+++ b/drivers/misc/microchip_flexcom.c
@@ -23,7 +23,7 @@
 
 static int microchip_flexcom_ofdata_to_platdata(struct udevice *dev)
 {
-	struct microchip_flexcom_platdata *plat = dev_get_platdata(dev);
+	struct microchip_flexcom_platdata *plat = dev_get_plat(dev);
 	int ret;
 
 	plat->regs = map_physmem(dev_read_addr(dev),