lib: Raw import FDT devicetree from depthcharge

Import from https://chromium.googlesource.com/chromiumos/platform/depthcharge
Required for general devicetree patching and FIT support.

Coding style and coreboot integration will be done in a separate commit.

Change-Id: Ida75d4786eae38d84bfc71bf53573dafca8eda40
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/25632
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

src/lib/list.c

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2012 Google Inc.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but without any warranty; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include "base/list.h"
+
+void list_remove(ListNode *node)
+{
+	if (node->prev)
+		node->prev->next = node->next;
+	if (node->next)
+		node->next->prev = node->prev;
+}
+
+void list_insert_after(ListNode *node, ListNode *after)
+{
+	node->next = after->next;
+	node->prev = after;
+	after->next = node;
+	if (node->next)
+		node->next->prev = node;
+}
+
+void list_insert_before(ListNode *node, ListNode *before)
+{
+	node->prev = before->prev;
+	node->next = before;
+	before->prev = node;
+	if (node->prev)
+		node->prev->next = node;
+}