commit 7ebf8eff63b4f349e7b2ded6aa5036d94bdf94b9 upstream.

Introduce a new structure, rapl_if_private, to save the private data
for different RAPL Interface.
Reviewed-by: NPandruvada, Srinivas <srinivas.pandruvada@intel.com>
Tested-by: NPandruvada, Srinivas <srinivas.pandruvada@intel.com>
Signed-off-by: NZhang Rui <rui.zhang@intel.com>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: NYouquan Song <youquan.song@intel.com>
Signed-off-by: NJeffle Xu <jefflexu@linux.alibaba.com>
Acked-by: NJoseph Qi <joseph.qi@linux.alibaba.com>
Acked-by: NCaspar Zhang <caspar@linux.alibaba.com>