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/drivers/cpu/bmips_cpu.c b/drivers/cpu/bmips_cpu.c
index fc2084f..172bc99 100644
--- a/drivers/cpu/bmips_cpu.c
+++ b/drivers/cpu/bmips_cpu.c
@@ -425,7 +425,7 @@
 /* BMIPS CPU driver */
 int bmips_cpu_bind(struct udevice *dev)
 {
-	struct cpu_platdata *plat = dev_get_parent_plat(dev);
+	struct cpu_plat *plat = dev_get_parent_plat(dev);
 
 	plat->cpu_id = dev_read_u32_default(dev, "reg", -1);
 	plat->device_id = read_c0_prid();