cpufreq: governor: Drop unused field 'cpu'

Its not used at all, drop it.
Reviewed-by: NPreeti U Murthy <preeti@linux.vnet.ibm.com>
Signed-off-by: NViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/cpufreq_governor.c

@@ -353,7 +353,6 @@ static int cpufreq_governor_start(struct cpufreq_policy *policy,
 		struct cpu_dbs_common_info *j_cdbs = cdata->get_cpu_cdbs(j);
 		unsigned int prev_load;
 
-		j_cdbs->cpu = j;
 		j_cdbs->cur_policy = policy;
 		j_cdbs->prev_cpu_idle =
 			get_cpu_idle_time(j, &j_cdbs->prev_cpu_wall, io_busy);

drivers/cpufreq/cpufreq_governor.h

@@ -130,7 +130,6 @@ static void *get_cpu_dbs_info_s(int cpu)				\
 
 /* Per cpu structures */
 struct cpu_dbs_common_info {
-	int cpu;
 	u64 prev_cpu_idle;
 	u64 prev_cpu_wall;
 	u64 prev_cpu_nice;