stdio: Correct code style nits

Fix a few code style nits in stdio_get_by_name().
Signed-off-by: NSimon Glass <sjg@chromium.org>

common/stdio.c

@@ -173,12 +173,12 @@ static int stdio_probe_device(const char *name, enum uclass_id id,
 }
 #endif
 
-struct stdio_dev* stdio_get_by_name(const char *name)
+struct stdio_dev *stdio_get_by_name(const char *name)
 {
 	struct list_head *pos;
 	struct stdio_dev *sdev;
 
-	if(!name)
+	if (!name)
 		return NULL;
 
 	list_for_each(pos, &(devs.list)) {