[PATCH RFC v5 3/3] Documentation: arm: define DT idle states bindings

[Sebastian Capella]

Hi Lorenzo,

I like this :)

I was going to suggest linking the tree upside down (starting with the
leaves such that walking the list takes you back to the root node
(system sleep), but I don't think it matters as long as the
relationship is established (which this does).  I tend to think of
these states in that order, starting from the leaf(shallowest idle
state) and working back to the root(system sleep) since it provides a
simple linear view of the sleep states from the cpu perspective, yet
keeps the heirarchy.

Sebastian