libpfm4 Merge Request #24: Add ICL/SPR performance counter to the event table (merged)

On SapphireRapids platforms, I cannot access performance counters through libpfm4. After further investigations, it seems the issue is thatthe corresponding events are never added to the event table due to the absence of INTEL_V5_ATTRS in switch-case statement. Therefore, on SapphireRapid platforms (and maybe on IceLake too?), the events are never available and calls to pfm_get_os_event_encoding() always fail as the corresponding event is never found.