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/drivers/core/root.c b/drivers/core/root.c
index f2fba58..9ef2429 100644
--- a/drivers/core/root.c
+++ b/drivers/core/root.c
@@ -86,8 +86,8 @@
 void fix_uclass(void)
 {
 	struct uclass_driver *uclass =
-		ll_entry_start(struct uclass_driver, uclass);
-	const int n_ents = ll_entry_count(struct uclass_driver, uclass);
+		ll_entry_start(struct uclass_driver, uclass_driver);
+	const int n_ents = ll_entry_count(struct uclass_driver, uclass_driver);
 	struct uclass_driver *entry;
 
 	for (entry = uclass; entry != uclass + n_ents; entry++) {