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/mmc/nexell_dw_mmc.c b/drivers/mmc/nexell_dw_mmc.c
index d03d589..537be0d 100644
--- a/drivers/mmc/nexell_dw_mmc.c
+++ b/drivers/mmc/nexell_dw_mmc.c
@@ -179,7 +179,7 @@
 
 static int nexell_dwmmc_probe(struct udevice *dev)
 {
-	struct nexell_mmc_plat *plat = dev_get_platdata(dev);
+	struct nexell_mmc_plat *plat = dev_get_plat(dev);
 	struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
 	struct nexell_dwmmc_priv *priv = dev_get_priv(dev);
 	struct dwmci_host *host = &priv->host;
@@ -214,7 +214,7 @@
 
 static int nexell_dwmmc_bind(struct udevice *dev)
 {
-	struct nexell_mmc_plat *plat = dev_get_platdata(dev);
+	struct nexell_mmc_plat *plat = dev_get_plat(dev);
 
 	return dwmci_bind(dev, &plat->mmc, &plat->cfg);
 }