dm: treewide: Rename 'platdata' variables to just 'plat'

We use 'priv' for private data but often use 'platdata' for platform data.
We can't really use 'pdata' since that is ambiguous (it could mean private
or platform data).

Rename some of the latter variables to end with 'plat' for consistency.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/serial/serial_rockchip.c b/drivers/serial/serial_rockchip.c
index 74245f8..e00df4b 100644
--- a/drivers/serial/serial_rockchip.c
+++ b/drivers/serial/serial_rockchip.c
@@ -34,7 +34,7 @@
 	plat->plat.reg_shift = plat->dtplat.reg_shift;
 	plat->plat.clock = plat->dtplat.clock_frequency;
 	plat->plat.fcr = UART_FCR_DEFVAL;
-	dev->platdata = &plat->plat;
+	dev->plat = &plat->plat;
 
 	return ns16550_serial_probe(dev);
 }
@@ -43,7 +43,7 @@
 	.name	= "rockchip_rk3188_uart",
 	.id	= UCLASS_SERIAL,
 	.priv_auto	= sizeof(struct NS16550),
-	.platdata_auto	= sizeof(struct rockchip_uart_platdata),
+	.plat_auto	= sizeof(struct rockchip_uart_platdata),
 	.probe	= rockchip_serial_probe,
 	.ops	= &ns16550_serial_ops,
 	.flags	= DM_FLAG_PRE_RELOC,
@@ -53,7 +53,7 @@
 	.name	= "rockchip_rk3288_uart",
 	.id	= UCLASS_SERIAL,
 	.priv_auto	= sizeof(struct NS16550),
-	.platdata_auto	= sizeof(struct rockchip_uart_platdata),
+	.plat_auto	= sizeof(struct rockchip_uart_platdata),
 	.probe	= rockchip_serial_probe,
 	.ops	= &ns16550_serial_ops,
 	.flags	= DM_FLAG_PRE_RELOC,