Merge branch 'nvme-4.14' of git://git.infradead.org/nvme into for-4.14/block-postmerge

Pull NVMe updates from Christoph:

"A few more nvme updates for 4.14:

 - generate a correct default NQN (Daniel Verkamp)
 - metadata passthrough for the NVME_IOCTL_IO_CMD ioctl, as well as
   related fixes and cleanups (Keith)
 - better scalability for connecting to the NVMeOF target (Roland Dreier)
 - target support for reading the host identifier (Omri Mann)"