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/include/spi.h b/include/spi.h
index f69c08d..176a42c 100644
--- a/include/spi.h
+++ b/include/spi.h
@@ -48,8 +48,8 @@
  * struct dm_spi_platdata - platform data for all SPI slaves
  *
  * This describes a SPI slave, a child device of the SPI bus. To obtain this
- * struct from a spi_slave, use dev_get_parent_platdata(dev) or
- * dev_get_parent_platdata(slave->dev).
+ * struct from a spi_slave, use dev_get_parent_plat(dev) or
+ * dev_get_parent_plat(slave->dev).
  *
  * This data is immuatable. Each time the device is probed, @max_hz and @mode
  * will be copied to struct spi_slave.
@@ -566,12 +566,12 @@
  * is automatically bound on this chip select with requested speed and mode.
  *
  * Ths new slave device is probed ready for use with the speed and mode
- * from platdata when available or the requested values.
+ * from plat when available or the requested values.
  *
  * @busnum:	SPI bus number
  * @cs:		Chip select to look for
- * @speed:	SPI speed to use for this slave when not available in platdata
- * @mode:	SPI mode to use for this slave when not available in platdata
+ * @speed:	SPI speed to use for this slave when not available in plat
+ * @mode:	SPI mode to use for this slave when not available in plat
  * @drv_name:	Name of driver to attach to this chip select
  * @dev_name:	Name of the new device thus created
  * @busp:	Returns bus device