Linux 4.8 rc6

Things calmed down, and look very normal. About two thirds driver
updates, with half of the remainder being misc architecture updates,
and the rest being random stuff (some fs/crypto fixes etc).

Of course, just minutes after I pushed it out, David sent me the
networking pull request, so there's perhaps a reason why rc6 looks
fairly small. Oh well. I still haven't decided whether we're going to
do an rc8, but I guess I don't have to decide yet. Nothing looks
particularly bad, and it will depend on how rc7 looks.

Shortlog appended - it's small enough to easily scan to get a feel for
what's been going on.