perf evsel: Add per-thread warning for EOPNOTSUPP open failues

perf evsel: Add per-thread warning for EOPNOTSUPP open failues

The mrvl_ddr_pmu will return EOPNOTSUPP if opened in per-thread
mode. Give a warning for this similar to EINVAL.

Doing this better supports metric testing with limited permissions when
the mrvl_ddr_pmu is present, as the failure to open causes the test to
skip and not fail.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Weilin Wang <weilin.wang@intel.com>
Link: https://lore.kernel.org/r/20250412004704.2297939-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>