[PATCH v2] drm/i915: Use common RPS scheme for Cherryview

Apolgies, I changed trees between resending after the first git-send-email bounced off the wrong address. -Chris -- Chris Wilson, Intel Open Source Technology Centre

[PATCH v2] drm/i915: Use common RPS scheme for Cherryview

Cherryview uses a custom static definition of its RPS parameters (for automatically driving GPU frequency selection) - yet still couples into the waitboosting scheme of the common RPS setup. The rationale given in commit 8fb55197e64d ("drm/i915: Agressive downclocking on Baytrail") was that