Pull operating performance points (OPP) framework changes for v5.3
from Viresh Kumar:

"This pull request contains:

 - OPP core changes to support a wider range of devices, like IO
   devices (Rajendra Nayak and Stehpen Boyd).
 - Fixes around genpd_virt_devs (Viresh Kumar).
 - Fix for platform with set_opp() callback (Dmitry Osipenko)."

* 'opp/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm:
  opp: Don't use IS_ERR on invalid supplies
  opp: Make dev_pm_opp_set_rate() handle freq = 0 to drop performance votes
  opp: Don't overwrite rounded clk rate
  opp: Allocate genpd_virt_devs from dev_pm_opp_attach_genpd()
  opp: Attach genpds to devices from within OPP core