[tip: perf/core] tools feature: Add support for detecting libpfm4

The following commit has been merged into the perf/core branch of tip: Commit-ID: 5ef86146de941f273d669a8e018036f549bf058c Gitweb: https://git.kernel.org/tip/5ef86146de941f273d669a8e018036f549bf058c Author:Stephane Eranian AuthorDate:Wed, 29 Apr 2020 16:14:41 -07:00 Commit

[tip: perf/core] perf pmu: Add perf_pmu__find_by_type helper

The following commit has been merged into the perf/core branch of tip: Commit-ID: 3a50dc76058d7cd8315f9c712b793d81a7ff4541 Gitweb: https://git.kernel.org/tip/3a50dc76058d7cd8315f9c712b793d81a7ff4541 Author:Stephane Eranian AuthorDate:Wed, 29 Apr 2020 16:14:42 -07:00 Commit