powercap: idle_inject: Fix warnings with make W=1
Fix following warning at three places:
Function parameter or member 'ii_dev' not described.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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