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/doc/driver-model/spi-howto.rst b/doc/driver-model/spi-howto.rst
index a12d692..6a1aace 100644
--- a/doc/driver-model/spi-howto.rst
+++ b/doc/driver-model/spi-howto.rst
@@ -231,7 +231,7 @@
 
 	U_BOOT_DRIVER(spi_exynos) = {
 	...
-		.platdata_auto = sizeof(struct exynos_spi_platdata),
+		.plat_auto = sizeof(struct exynos_spi_platdata),
 
 
 Here is a sample function. It gets a pointer to the platform data and
@@ -241,7 +241,7 @@
 
 	static int exynos_spi_ofdata_to_platdata(struct udevice *bus)
 	{
-		struct exynos_spi_platdata *plat = bus->platdata;
+		struct exynos_spi_platdata *plat = bus->plat;
 		const void *blob = gd->fdt_blob;
 		int node = dev_of_offset(bus);
 
@@ -283,7 +283,7 @@
 
 	U_BOOT_DEVICE(board_spi0) = {
 		.name = "exynos_spi",
-		.platdata = &platdata_spi0,
+		.plat = &platdata_spi0,
 	};
 
 You will unfortunately need to put the struct definition into a header file
@@ -437,7 +437,7 @@
 
 	static int exynos_spi_set_speed(struct udevice *bus, uint speed)
 	{
-		struct exynos_spi_platdata *plat = bus->platdata;
+		struct exynos_spi_platdata *plat = bus->plat;
 		struct exynos_spi_priv *priv = dev_get_priv(bus);
 		int ret;
 
@@ -658,7 +658,7 @@
 The SPI uclass keeps some information about each device 'dev' on the bus:
 
    struct dm_spi_slave_platdata:
-     This is device_get_parent_platdata(dev).
+     This is device_get_parent_plat(dev).
      This is where the chip select number is stored, along with
      the default bus speed and mode. It is automatically read
      from the device tree in spi_child_post_bind(). It must not