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/arch/arm/mach-rockchip/spl-boot-order.c b/arch/arm/mach-rockchip/spl-boot-order.c
index 94673f3..8ccd5af 100644
--- a/arch/arm/mach-rockchip/spl-boot-order.c
+++ b/arch/arm/mach-rockchip/spl-boot-order.c
@@ -46,7 +46,7 @@
 		     dev;
 		     device_find_next_child(&dev)) {
 			if (device_get_uclass_id(dev) == UCLASS_BLK) {
-				desc = dev_get_uclass_platdata(dev);
+				desc = dev_get_uclass_plat(dev);
 				break;
 			}
 		}
@@ -99,7 +99,7 @@
 
 void board_boot_order(u32 *spl_boot_list)
 {
-	/* In case of no fdt (or only platdata), use spl_boot_device() */
+	/* In case of no fdt (or only plat), use spl_boot_device() */
 	if (!CONFIG_IS_ENABLED(OF_CONTROL) || CONFIG_IS_ENABLED(OF_PLATDATA)) {
 		spl_boot_list[0] = spl_boot_device();
 		return;