treewide: Move list.h to commonlib

It is needed in order to move device_tree.c into commonlib in a
subsequent commit.

Signed-off-by: Maximilian Brune <maximilian.brune@9elements.com>
Change-Id: I16eb7b743fb1d36301f0eda563a62364e7a9cfec
Reviewed-on: https://review.coreboot.org/c/coreboot/+/77968
Reviewed-by: Julius Werner <jwerner@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/commonlib/list.c

@@ -0,0 +1,38 @@
+/* Taken from depthcharge: src/base/list.c */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <commonlib/list.h>
+
+void list_remove(struct list_node *node)
+{
+	if (node->prev)
+		node->prev->next = node->next;
+	if (node->next)
+		node->next->prev = node->prev;
+}
+
+void list_insert_after(struct list_node *node, struct list_node *after)
+{
+	node->next = after->next;
+	node->prev = after;
+	after->next = node;
+	if (node->next)
+		node->next->prev = node;
+}
+
+void list_insert_before(struct list_node *node, struct list_node *before)
+{
+	node->prev = before->prev;
+	node->next = before;
+	before->prev = node;
+	if (node->prev)
+		node->prev->next = node;
+}
+
+void list_append(struct list_node *node, struct list_node *head)
+{
+	while (head->next)
+		head = head->next;
+
+	list_insert_after(node, head);
+}