perf tools: move perf_pmus__find_core_pmu() prototype to pmus.h

JIRA: https://issues.redhat.com/browse/RHEL-78200

upstream
========
commit ac87187
Author: Thomas Falcon <[email protected]>
Date: Thu Jun 12 11:36:58 2025 -0500

description
===========
perf_pmus__find_core_pmu() is implemented in util/pmus.c but its
prototpye is in util/pmu.h. Move it to util/pmus.h.

    Suggested-by: Ian Rogers <[email protected]>
    Signed-off-by: Thomas Falcon <[email protected]>
    Reviewed-by: Ian Rogers <[email protected]>
    Link: https://lore.kernel.org/r/[email protected]
    Signed-off-by: Namhyung Kim <[email protected]>

Signed-off-by: Anubhav Shelat <[email protected]>

Author: AnubhavS1

tools/perf/util/pmu.h

@@ -302,7 +302,6 @@ struct perf_pmu *perf_pmu__lookup(struct list_head *pmus, int dirfd, const char
 				  bool eager_load);
 struct perf_pmu *perf_pmu__create_placeholder_core_pmu(struct list_head *core_pmus);
 void perf_pmu__delete(struct perf_pmu *pmu);
-struct perf_pmu *perf_pmus__find_core_pmu(void);
 
 const char *perf_pmu__name_from_config(struct perf_pmu *pmu, u64 config);
 bool perf_pmu__is_fake(const struct perf_pmu *pmu);

tools/perf/util/pmus.h

@@ -35,5 +35,6 @@ struct perf_pmu *perf_pmus__add_test_hwmon_pmu(int hwmon_dir,
 					       const char *sysfs_name,
 					       const char *name);
 struct perf_pmu *perf_pmus__fake_pmu(void);
+struct perf_pmu *perf_pmus__find_core_pmu(void);
 
 #endif /* __PMUS_H */