scheduler: cpuacct: Enable platform callbacks for cpuacct power tracking

Platform must register cpu power function that return power in
milliWatt seconds.

Change-Id: I1caa0335e316c352eee3b1ddf326fcd4942bcbe8
Signed-off-by: Mike Chan <mike@android.com>
diff --git a/include/linux/cpuacct.h b/include/linux/cpuacct.h
index 560df02..8f68e73 100644
--- a/include/linux/cpuacct.h
+++ b/include/linux/cpuacct.h
@@ -31,7 +31,9 @@
 	 */
 	void (*init) (void **cpuacct_data);
 	void (*charge) (void *cpuacct_data,  u64 cputime, unsigned int cpu);
-	void (*show) (void *cpuacct_data, struct cgroup_map_cb *cb);
+	void (*cpufreq_show) (void *cpuacct_data, struct cgroup_map_cb *cb);
+	/* Returns power consumed in milliWatt seconds */
+	u64 (*power_usage) (void *cpuacct_data);
 };
 
 int cpuacct_charge_register(struct cpuacct_charge_calls *fn);