libperf: Add perf_cpu_map__new()/perf_cpu_map__read() functions

Moving the following functions from tools/perf:

  cpu_map__new()
  cpu_map__read()

to libperf with the following names:

  perf_cpu_map__new()
  perf_cpu_map__read()

Committer notes:

Fixed up this one:

  tools/perf/arch/arm/util/cs-etm.c

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190721112506.12306-44-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index d81afe5..fa914ba 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -20,6 +20,7 @@
 #include <linux/time64.h>
 #include <dirent.h>
 #include <bpf/libbpf.h>
+#include <perf/cpumap.h>
 
 #include "evlist.h"
 #include "evsel.h"
@@ -2348,7 +2349,7 @@ static int process_numa_topology(struct feat_fd *ff, void *data __maybe_unused)
 		if (!str)
 			goto error;
 
-		n->map = cpu_map__new(str);
+		n->map = perf_cpu_map__new(str);
 		if (!n->map)
 			goto error;