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/include/dm/platform_data/spi_coldfire.h b/include/dm/platform_data/spi_coldfire.h
index 8ad8eae..da514ba 100644
--- a/include/dm/platform_data/spi_coldfire.h
+++ b/include/dm/platform_data/spi_coldfire.h
@@ -10,14 +10,14 @@
 #define MAX_CTAR_FIELDS		8
 
 /*
- * struct coldfire_spi_platdata - information about a coldfire spi module
+ * struct coldfire_spi_plat - information about a coldfire spi module
  *
  * @regs_addr: base address for module registers
  * @speed_hz: default SCK frequency
  * @mode: default SPI mode
  * @num_cs: number of DSPI chipselect signals
  */
-struct coldfire_spi_platdata {
+struct coldfire_spi_plat {
 	fdt_addr_t regs_addr;
 	uint speed_hz;
 	uint mode;