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According to HSW PM programming guide, frequency bits starts at 24 instead of 25. v2: Paulo Zanoni noticed that only frequency bits can be set at GEN6_RPNSWREQ. All others are read only. CC: Ben Widawsky <ben@bwidawsk.net> CC: Paulo Zanoni <paulo.r.zanoni@intel.com> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@gmail.com> Reviewed-by: Ben Widawsky <ben@bwidawsk.net> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>