dm: core: Use 'uclass_driver' for the uclass linker_list

At present the name 'uclass_driver' is used for the uclass linker list.
This does not follow the convention of using the struct name. Fix it.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/dm/uclass.h b/include/dm/uclass.h
index 91edbfb..fde08fe 100644
--- a/include/dm/uclass.h
+++ b/include/dm/uclass.h
@@ -112,7 +112,7 @@
 
 /* Declare a new uclass_driver */
 #define UCLASS_DRIVER(__name)						\
-	ll_entry_declare(struct uclass_driver, __name, uclass)
+	ll_entry_declare(struct uclass_driver, __name, uclass_driver)
 
 /**
  * uclass_get() - Get a uclass based on an ID, creating it if needed