perf parse-events: Ignore case in topdown.slots check

An issue with icelakex metrics:

https://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git/tree/tools/perf/pmu-events/arch/x86/icelakex/icx-metrics.json?h=perf/core&id=65eab2bc7dab326ee892ec5a4c749470b368b51a#n48

That causes the slots not to be first.

Fixes: 94dbfd6781a0e87b ("perf parse-events: Architecture specific leader override")
Reported-by: Caleb Biggers <[e-mail]>
Signed-off-by: Ian Rogers <[e-mail]>
Cc: Alexander Shishkin <[e-mail]>
Cc: Alexandre Torgue <[e-mail]>
Cc: Andi Kleen <[e-mail]>
Cc: Ingo Molnar <[e-mail]>
Cc: James Clark <[e-mail]>
Cc: Jiri Olsa <[e-mail]>
Cc: John Garry <[e-mail]>
Cc: Kan Liang <[e-mail]>
Cc: Mark Rutland <[e-mail]>
Cc: Maxime Coquelin <[e-mail]>
Cc: Namhyung Kim <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Cc: Stephane Eranian <[e-mail]>
Cc: Zhengjun Xing <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/perf/arch/x86/util/evlist.c

···
 
 	__evlist__for_each_entry(list, evsel) {
 		if (evsel->pmu_name && !strcmp(evsel->pmu_name, "cpu") &&
-			evsel->name && strstr(evsel->name, "slots"))
+			evsel->name && strcasestr(evsel->name, "slots"))
 			return evsel;
 	}
 	return first;