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/sh_sdhi.c b/drivers/mmc/sh_sdhi.c
index 9fcd0e0..b8865b1 100644
--- a/drivers/mmc/sh_sdhi.c
+++ b/drivers/mmc/sh_sdhi.c
@@ -818,14 +818,14 @@
 
 static int sh_sdhi_dm_bind(struct udevice *dev)
 {
-	struct sh_sdhi_plat *plat = dev_get_platdata(dev);
+	struct sh_sdhi_plat *plat = dev_get_plat(dev);
 
 	return mmc_bind(dev, &plat->mmc, &plat->cfg);
 }
 
 static int sh_sdhi_dm_probe(struct udevice *dev)
 {
-	struct sh_sdhi_plat *plat = dev_get_platdata(dev);
+	struct sh_sdhi_plat *plat = dev_get_plat(dev);
 	struct sh_sdhi_host *host = dev_get_priv(dev);
 	struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
 	struct clk sh_sdhi_clk;