Reading RP1 for valleyview to help us enable "pm_rps" i-g-t testcase
execution.
Signed-off-by: NDeepak S <deepak.s@linux.intel.com>
Reviewed-by: NMika Kuoppala <mika.kuoppala@intel.com>
[danvet: Add missing static.]
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>