dm: treewide: Rename ..._platdata variables to just ..._plat

Try to maintain some consistency between these variables by using _plat as
a suffix for them.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/serial/serial_bcm283x_mu.c b/drivers/serial/serial_bcm283x_mu.c
index a53288d..58fa722 100644
--- a/drivers/serial/serial_bcm283x_mu.c
+++ b/drivers/serial/serial_bcm283x_mu.c
@@ -55,7 +55,7 @@
 
 static int bcm283x_mu_serial_setbrg(struct udevice *dev, int baudrate)
 {
-	struct bcm283x_mu_serial_platdata *plat = dev_get_plat(dev);
+	struct bcm283x_mu_serial_plat *plat = dev_get_plat(dev);
 	struct bcm283x_mu_priv *priv = dev_get_priv(dev);
 	struct bcm283x_mu_regs *regs = priv->regs;
 	u32 divider;
@@ -158,7 +158,7 @@
 
 static int bcm283x_mu_serial_probe(struct udevice *dev)
 {
-	struct bcm283x_mu_serial_platdata *plat = dev_get_plat(dev);
+	struct bcm283x_mu_serial_plat *plat = dev_get_plat(dev);
 	struct bcm283x_mu_priv *priv = dev_get_priv(dev);
 	fdt_addr_t addr;
 
@@ -194,7 +194,7 @@
 	.name = "serial_bcm283x_mu",
 	.id = UCLASS_SERIAL,
 	.of_match = of_match_ptr(bcm283x_mu_serial_id),
-	.plat_auto	= sizeof(struct bcm283x_mu_serial_platdata),
+	.plat_auto	= sizeof(struct bcm283x_mu_serial_plat),
 	.probe = bcm283x_mu_serial_probe,
 	.ops = &bcm283x_mu_serial_ops,
 #if !CONFIG_IS_ENABLED(OF_CONTROL) || CONFIG_IS_ENABLED(OF_BOARD)