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/power/acpi_pmc/acpi-pmc-uclass.c b/drivers/power/acpi_pmc/acpi-pmc-uclass.c
index 7eeecc0..32a2836 100644
--- a/drivers/power/acpi_pmc/acpi-pmc-uclass.c
+++ b/drivers/power/acpi_pmc/acpi-pmc-uclass.c
@@ -204,7 +204,7 @@
 	       upriv->gen_pmcon1, upriv->gen_pmcon2, upriv->gen_pmcon3);
 }
 
-int pmc_ofdata_to_uc_platdata(struct udevice *dev)
+int pmc_ofdata_to_uc_plat(struct udevice *dev)
 {
 	struct acpi_pmc_upriv *upriv = dev_get_uclass_priv(dev);
 	int ret;