perf arm-spe: Remove the unused 'midr' field

The 'midr' field is replaced by the MIDR values stored in metadata (per
CPU wise). Remove the 'midr' field as it is no longer used.

Signed-off-by: Leo Yan <leo.yan@arm.com>
Reviewed-by: James Clark <james.clark@linaro.org>
Link: https://lore.kernel.org/r/20241003185322.192357-6-leo.yan@arm.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
(cherry picked from commit 6bcf54c)
Signed-off-by: Andrea Righi <arighi@nvidia.com>

Author: Leo-Yan

tools/perf/util/arm-spe.c

@@ -48,7 +48,6 @@ struct arm_spe {
 	struct perf_session		*session;
 	struct machine			*machine;
 	u32				pmu_type;
-	u64				midr;
 
 	struct perf_tsc_conversion	tc;
 
@@ -1432,8 +1431,6 @@ int arm_spe_process_auxtrace_info(union perf_event *event,
 	struct perf_record_auxtrace_info *auxtrace_info = &event->auxtrace_info;
 	size_t min_sz = ARM_SPE_AUXTRACE_V1_PRIV_SIZE;
 	struct perf_record_time_conv *tc = &session->time_conv;
-	const char *cpuid = perf_env__cpuid(session->evlist->env);
-	u64 midr = strtol(cpuid, NULL, 16);
 	struct arm_spe *spe;
 	u64 **metadata = NULL;
 	u64 metadata_ver;
@@ -1467,7 +1464,6 @@ int arm_spe_process_auxtrace_info(union perf_event *event,
 		spe->pmu_type = auxtrace_info->priv[ARM_SPE_PMU_TYPE];
 	else
 		spe->pmu_type = auxtrace_info->priv[ARM_SPE_PMU_TYPE_V2];
-	spe->midr = midr;
 	spe->metadata = metadata;
 	spe->metadata_ver = metadata_ver;
 	spe->metadata_nr_cpu = nr_cpu;