cros_ec: Allow use with of-platdata

Avoid reading the device tree when of-platdata is in use.

Signed-off-by: Simon Glass <sjg@chromium.org>

drivers/misc/cros_ec.c

@@ -1577,6 +1577,8 @@ UCLASS_DRIVER(cros_ec) = {
 	.id		= UCLASS_CROS_EC,
 	.name		= "cros-ec",
 	.per_device_auto	= sizeof(struct cros_ec_dev),
+#if !CONFIG_IS_ENABLED(OF_PLATDATA)
 	.post_bind	= dm_scan_fdt_dev,
+#endif
 	.flags		= DM_UC_FLAG_ALLOC_PRIV_DMA,
 };