Merge branch 'fortglx/4.13/time' of https://git.linaro.org/people/john.stultz/linux into timers/core

Merge time(keeping) updates from John Stultz:

  "Just a small set of changes, the biggest changes being the MONOTONIC_RAW
   handling cleanup, and a new kselftest from Miroslav. Also a a clear
   warning deprecating CONFIG_GENERIC_TIME_VSYSCALL_OLD, which affects ppc
   and ia64."