perf pmu: Use available core PMU for raw events

perf pmu: Use available core PMU for raw events

When it finds a matching PMU for a legacy event, it should look for
core PMUs.  The raw events also refers to core events so it should be
handled similarly.

On x86, PERF_TYPE_RAW should match with the existing cpu PMU.  But on
ARM, there's no PMU with the matching type so it'll pick the first core
PMU for it.

Suggested-by: Ian Rogers <irogers@google.com>
Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250507215939.54399-1-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>