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/bcmstb_sdhci.c b/drivers/mmc/bcmstb_sdhci.c
index e8041eb..dc96818 100644
--- a/drivers/mmc/bcmstb_sdhci.c
+++ b/drivers/mmc/bcmstb_sdhci.c
@@ -49,7 +49,7 @@
 
 static int sdhci_bcmstb_bind(struct udevice *dev)
 {
-	struct sdhci_bcmstb_plat *plat = dev_get_platdata(dev);
+	struct sdhci_bcmstb_plat *plat = dev_get_plat(dev);
 
 	return sdhci_bind(dev, &plat->mmc, &plat->cfg);
 }
@@ -57,7 +57,7 @@
 static int sdhci_bcmstb_probe(struct udevice *dev)
 {
 	struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
-	struct sdhci_bcmstb_plat *plat = dev_get_platdata(dev);
+	struct sdhci_bcmstb_plat *plat = dev_get_plat(dev);
 	struct sdhci_host *host = dev_get_priv(dev);
 	fdt_addr_t base;
 	int ret;