drm/i915: Make some RPS functions static Signed-off-by: Oscar Mateo <oscar.mateo@intel.com> Signed-off-by: Oscar Mateo <oscar.mateo@intel.com> ...1503532705-3692-1-git-send-email-oscar.mateo@intel.com ...1503532705-3692-1-git-send-email-oscar.mateo@intel.com