kernel: remove the list_t alias since it's just a typedef for node

kernel-src/fs/abc.c

@@ -77,7 +77,7 @@ static void writer_thread(void) {
 	interrupt_loweripl(ipl);
 
 	for (;;) {
-		list_t internal_list;
+		list_node_t internal_list;
 		list_init(&internal_list);
 
 		eventlistener_t listener;

kernel-src/fs/vfs.c

@@ -50,7 +50,7 @@ typedef struct {
 	void *ctx;
 } root_event_waiter_t;
 
-static list_t root_event_list;
+static list_node_t root_event_list;
 static bool root_mounted;
 static mutex_t root_event_mutex;