perf cpumap: Tidy libperf includes

perf cpumap: Tidy libperf includes

Use public API when possible, don't include internal API in header
files in evsel.h. Fix any related breakages.

Committer note:

There was one missing case, when building for arm64:

  arch/arm64/util/pmu.c: In function 'pmu_events_table__find':
  arch/arm64/util/pmu.c:18:30: error: invalid use of undefined type 'struct perf_cpu_map'
     18 |                 if (pmu->cpus->nr != cpu__max_cpu().cpu)
        |                              ^~

Fix it by adding one more exception, including <internal/cpumap.h>

Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andrii Nakryiko <andrii.nakryiko@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Nicolas Schier <nicolas@fjasle.eu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: bpf@vger.kernel.org
Link: http://lore.kernel.org/lkml/20221109184914.1357295-14-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>