list.h: Make xorg_list_init inline

Otherwise this file is emitted in every unit that includes it.
Signed-off-by: Robert Morell <rmorell@nvidia.com>
Reviewed-by: Jamey Sharp <jamey@minilop.net>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

include/list.h

@@ -119,7 +119,7 @@ struct xorg_list {
  *
  * @param The list to initialized.
  */
-static void
+static inline void
 xorg_list_init(struct xorg_list *list)
 {
     list->next = list->prev = list;