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_arc.c b/drivers/serial/serial_arc.c
index dae55ea..022e377 100644
--- a/drivers/serial/serial_arc.c
+++ b/drivers/serial/serial_arc.c
@@ -25,7 +25,7 @@
 };
 
 
-struct arc_serial_platdata {
+struct arc_serial_plat {
 	struct arc_serial_regs *reg;
 	unsigned int uartclk;
 };
@@ -37,7 +37,7 @@
 
 static int arc_serial_setbrg(struct udevice *dev, int baudrate)
 {
-	struct arc_serial_platdata *plat = dev->plat;
+	struct arc_serial_plat *plat = dev->plat;
 	struct arc_serial_regs *const regs = plat->reg;
 	int arc_console_baud = gd->cpu_clk / (baudrate * 4) - 1;
 
@@ -49,7 +49,7 @@
 
 static int arc_serial_putc(struct udevice *dev, const char c)
 {
-	struct arc_serial_platdata *plat = dev->plat;
+	struct arc_serial_plat *plat = dev->plat;
 	struct arc_serial_regs *const regs = plat->reg;
 
 	while (!(readb(&regs->status) & UART_TXEMPTY))
@@ -67,7 +67,7 @@
 
 static int arc_serial_pending(struct udevice *dev, bool input)
 {
-	struct arc_serial_platdata *plat = dev->plat;
+	struct arc_serial_plat *plat = dev->plat;
 	struct arc_serial_regs *const regs = plat->reg;
 	uint32_t status = readb(&regs->status);
 
@@ -79,7 +79,7 @@
 
 static int arc_serial_getc(struct udevice *dev)
 {
-	struct arc_serial_platdata *plat = dev->plat;
+	struct arc_serial_plat *plat = dev->plat;
 	struct arc_serial_regs *const regs = plat->reg;
 
 	while (!arc_serial_tstc(regs))
@@ -111,7 +111,7 @@
 
 static int arc_serial_of_to_plat(struct udevice *dev)
 {
-	struct arc_serial_platdata *plat = dev_get_plat(dev);
+	struct arc_serial_plat *plat = dev_get_plat(dev);
 	DECLARE_GLOBAL_DATA_PTR;
 
 	plat->reg = dev_read_addr_ptr(dev);
@@ -126,7 +126,7 @@
 	.id	= UCLASS_SERIAL,
 	.of_match = arc_serial_ids,
 	.of_to_plat = arc_serial_of_to_plat,
-	.plat_auto	= sizeof(struct arc_serial_platdata),
+	.plat_auto	= sizeof(struct arc_serial_plat),
 	.probe = arc_serial_probe,
 	.ops	= &arc_serial_ops,
 };