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/root.h b/include/dm/root.h
index 113e92e..89afbee 100644
--- a/include/dm/root.h
+++ b/include/dm/root.h
@@ -31,7 +31,7 @@
 void dm_fixup_for_gd_move(struct global_data *new_gd);
 
 /**
- * dm_scan_platdata() - Scan all platform data and bind drivers
+ * dm_scan_plat() - Scan all platform data and bind drivers
  *
  * This scans all available plat and creates drivers for each
  *
@@ -39,7 +39,7 @@
  * flag. If false bind all drivers.
  * @return 0 if OK, -ve on error
  */
-int dm_scan_platdata(bool pre_reloc_only);
+int dm_scan_plat(bool pre_reloc_only);
 
 /**
  * dm_scan_fdt() - Scan the device tree and bind drivers