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/zynq_sdhci.c b/drivers/mmc/zynq_sdhci.c
index 919e5d7..29850a4 100644
--- a/drivers/mmc/zynq_sdhci.c
+++ b/drivers/mmc/zynq_sdhci.c
@@ -552,7 +552,7 @@
 
 static int arasan_sdhci_probe(struct udevice *dev)
 {
-	struct arasan_sdhci_plat *plat = dev_get_platdata(dev);
+	struct arasan_sdhci_plat *plat = dev_get_plat(dev);
 	struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
 	struct arasan_sdhci_priv *priv = dev_get_priv(dev);
 	struct sdhci_host *host;
@@ -641,7 +641,7 @@
 
 static int arasan_sdhci_bind(struct udevice *dev)
 {
-	struct arasan_sdhci_plat *plat = dev_get_platdata(dev);
+	struct arasan_sdhci_plat *plat = dev_get_plat(dev);
 
 	return sdhci_bind(dev, &plat->mmc, &plat->cfg);
 }