Pull spi uaccess delousing from Al Viro:
 "Getting rid of pointless __get_user() and friends in drivers/spi.

  [ the only reason it's on a separate branch is that I hoped it would
    be picked by spi folks; looks like mail asking them to grab it got
    lost and I hadn't followed up on that ]"

* 'for-spi' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  spidev: quit messing with access_ok()