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/arch/x86/cpu/apollolake/uart.c b/arch/x86/cpu/apollolake/uart.c
index 44eba0c..bb6da03 100644
--- a/arch/x86/cpu/apollolake/uart.c
+++ b/arch/x86/cpu/apollolake/uart.c
@@ -77,7 +77,7 @@
 
 static int apl_ns16550_probe(struct udevice *dev)
 {
-	struct ns16550_platdata *plat = dev_get_platdata(dev);
+	struct ns16550_platdata *plat = dev_get_plat(dev);
 
 	if (!CONFIG_IS_ENABLED(PCI))
 		apl_uart_init(plat->bdf, plat->base);
@@ -88,7 +88,7 @@
 static int apl_ns16550_ofdata_to_platdata(struct udevice *dev)
 {
 #if CONFIG_IS_ENABLED(OF_PLATDATA)
-	struct dtd_intel_apl_ns16550 *dtplat = dev_get_platdata(dev);
+	struct dtd_intel_apl_ns16550 *dtplat = dev_get_plat(dev);
 	struct ns16550_platdata *plat;
 
 	/*