dm: core: Correct comment on uclass_id_foreach_dev()

This parameter should be a struct uclass, not struct udevice. Correct it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-By: Michael Trimarchi <michael@amarulasolutions.com>
diff --git a/include/dm/uclass.h b/include/dm/uclass.h
index 70fca79..67ff746 100644
--- a/include/dm/uclass.h
+++ b/include/dm/uclass.h
@@ -390,7 +390,7 @@
  * @id: enum uclass_id ID to use
  * @pos: struct udevice * to hold the current device. Set to NULL when there
  * are no more devices.
- * @uc: temporary uclass variable (struct udevice *)
+ * @uc: temporary uclass variable (struct uclass *)
  */
 #define uclass_id_foreach_dev(id, pos, uc) \
 	if (!uclass_get(id, &uc)) \