Kernel prepatch 4.7-rc3

The third 4.7 prepatch is out for testing.Linus says: "The diffstat looks fairly normal and innocuous. There'smore of a filesystem component to it than usual, but that's mostly someadded new btrfs tests, and if you ignore that part it's all the normalstuff: drivers dominate (gpu and networking drivers are the bulk, butthere's i2c, rdma, ...) with some arch updates, and general networkingcode. And the usual random stuff all over."