Merge branch 'opp/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm

Pull an OPP fix for 4.18-rc2 from Viresh Kumar.

* 'opp/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm:
  PM / OPP: Update voltage in case freq == old_freq