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/video/raydium-rm68200.c b/drivers/video/raydium-rm68200.c
index 82e8f04..a370cd9 100644
--- a/drivers/video/raydium-rm68200.c
+++ b/drivers/video/raydium-rm68200.c
@@ -92,7 +92,7 @@
 static void rm68200_dcs_write_buf(struct udevice *dev, const void *data,
 				  size_t len)
 {
-	struct mipi_dsi_panel_plat *plat = dev_get_platdata(dev);
+	struct mipi_dsi_panel_plat *plat = dev_get_plat(dev);
 	struct mipi_dsi_device *device = plat->device;
 	int err;
 
@@ -103,7 +103,7 @@
 
 static void rm68200_dcs_write_cmd(struct udevice *dev, u8 cmd, u8 value)
 {
-	struct mipi_dsi_panel_plat *plat = dev_get_platdata(dev);
+	struct mipi_dsi_panel_plat *plat = dev_get_plat(dev);
 	struct mipi_dsi_device *device = plat->device;
 	int err;
 
@@ -223,7 +223,7 @@
 
 static int rm68200_panel_enable_backlight(struct udevice *dev)
 {
-	struct mipi_dsi_panel_plat *plat = dev_get_platdata(dev);
+	struct mipi_dsi_panel_plat *plat = dev_get_plat(dev);
 	struct mipi_dsi_device *device = plat->device;
 	struct rm68200_panel_priv *priv = dev_get_priv(dev);
 	int ret;
@@ -296,7 +296,7 @@
 static int rm68200_panel_probe(struct udevice *dev)
 {
 	struct rm68200_panel_priv *priv = dev_get_priv(dev);
-	struct mipi_dsi_panel_plat *plat = dev_get_platdata(dev);
+	struct mipi_dsi_panel_plat *plat = dev_get_plat(dev);
 	int ret;
 
 	if (IS_ENABLED(CONFIG_DM_REGULATOR) && priv->reg) {