perf cpumap: Fix die and cluster IDs

Now that filename__read_int() returns -errno instead of -1 these
statements need to be updated otherwise error values will be used as
die IDs.

This appears as a -2 die ID when the platform doesn't export one:

  $ perf stat --per-core -a -- true

  S36-D-2-C0            1               9.45 msec cpu-clock

And the session topology test fails:

  $ perf test -vvv topology

  CPU 0, core 0, socket 36
  CPU 1, core 1, socket 36
  CPU 2, core 2, socket 36
  CPU 3, core 3, socket 36
  FAILED tests/topology.c:137 Cpu map - Die ID doesn't match
  ---- end(-1) ----
  38: Session topology                                                : FAILED!

Fixes: 05be17e ("tool api fs: Correctly encode errno for read/write open failures")
Reported-by: Thomas Richter <tmricht@linux.ibm.com>
Signed-off-by: James Clark <james.clark@linaro.org>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20241218115552.912517-1-james.clark@linaro.org
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

Author: james-c-linaro

tools/perf/util/cpumap.c

@@ -293,7 +293,7 @@ struct aggr_cpu_id aggr_cpu_id__die(struct perf_cpu cpu, void *data)
 
 	die = cpu__get_die_id(cpu);
 	/* There is no die_id on legacy system. */
-	if (die == -1)
+	if (die < 0)
 		die = 0;
 
 	/*
@@ -322,7 +322,7 @@ struct aggr_cpu_id aggr_cpu_id__cluster(struct perf_cpu cpu, void *data)
 	struct aggr_cpu_id id;
 
 	/* There is no cluster_id on legacy system. */
-	if (cluster == -1)
+	if (cluster < 0)
 		cluster = 0;
 
 	id = aggr_cpu_id__die(cpu, data);