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/net/rtl8169.c b/drivers/net/rtl8169.c
index dc3405e..7aac8a9 100644
--- a/drivers/net/rtl8169.c
+++ b/drivers/net/rtl8169.c
@@ -890,7 +890,7 @@
 #ifdef CONFIG_DM_ETH
 static int rtl8169_eth_start(struct udevice *dev)
 {
-	struct eth_pdata *plat = dev_get_platdata(dev);
+	struct eth_pdata *plat = dev_get_plat(dev);
 	struct rtl8169_private *priv = dev_get_priv(dev);
 
 	rtl8169_common_start(dev, plat->enetaddr, priv->iobase);
@@ -953,7 +953,7 @@
 #ifdef CONFIG_DM_ETH
 static int rtl8169_write_hwaddr(struct udevice *dev)
 {
-	struct eth_pdata *plat = dev_get_platdata(dev);
+	struct eth_pdata *plat = dev_get_plat(dev);
 	unsigned int i;
 
 	RTL_W8(Cfg9346, Cfg9346_Unlock);
@@ -1189,7 +1189,7 @@
 {
 	struct pci_child_platdata *pplat = dev_get_parent_plat(dev);
 	struct rtl8169_private *priv = dev_get_priv(dev);
-	struct eth_pdata *plat = dev_get_platdata(dev);
+	struct eth_pdata *plat = dev_get_plat(dev);
 	u32 iobase;
 	int region;
 	int ret;