Todo list for devicetree:

=== General structure ===
- Switch from custom lists to (h)list_head for nodes and properties structure
- Remove of_allnodes list and iterate using list of child nodes alone

=== CONFIG_OF_DYNAMIC ===
- Switch to RCU for tree updates and get rid of global spinlock
- Document node lifecycle for CONFIG_OF_DYNAMIC
- Always set ->full_name at of_attach_node() time
- pseries: Get rid of open-coded tree modification from arch/powerpc/platforms/pseries/dlpar.c
