perf stat: Rename saved_value->cpu_map_idx

The cpu_map_idx fields is just to differentiate values from other
entries.  It doesn't need to be strictly cpu map index.  Actually we can
pass thread map index or aggr map index.  So rename the fields first.

No functional change intended.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Link: https://lore.kernel.org/r/20220930202110.845199-4-namhyung@kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/stat.h

@@ -234,7 +234,7 @@ void perf_stat__init_shadow_stats(void);
 void perf_stat__reset_shadow_stats(void);
 void perf_stat__reset_shadow_per_stat(struct runtime_stat *st);
 void perf_stat__update_shadow_stats(struct evsel *counter, u64 count,
-				    int cpu_map_idx, struct runtime_stat *st);
+				    int map_idx, struct runtime_stat *st);
 struct perf_stat_output_ctx {
 	void *ctx;
 	print_metric_t print_metric;
@@ -244,7 +244,7 @@ struct perf_stat_output_ctx {
 
 void perf_stat__print_shadow_stats(struct perf_stat_config *config,
 				   struct evsel *evsel,
-				   double avg, int cpu,
+				   double avg, int map_idx,
 				   struct perf_stat_output_ctx *out,
 				   struct rblist *metric_events,
 				   struct runtime_stat *st);
@@ -279,5 +279,5 @@ void evlist__print_counters(struct evlist *evlist, struct perf_stat_config *conf
 			    struct target *_target, struct timespec *ts, int argc, const char **argv);
 
 struct metric_expr;
-double test_generic_metric(struct metric_expr *mexp, int cpu_map_idx, struct runtime_stat *st);
+double test_generic_metric(struct metric_expr *mexp, int map_idx, struct runtime_stat *st);
 #endif