Check for zen microarch bug on all Zen microarches

Commit ca5c4d9 split out the Zen microarches by generation, but did not
update the check for the presence of the Zen SpecLockMap workaround.
The issue is applicable to all Zen generations, so adjust the check
accordingly.

src/PerfCounters_x86.h

@@ -395,7 +395,7 @@ static void check_for_arch_bugs(perf_event_attrs &perf_attr) {
   if (uarch >= IntelCometlake && uarch <= LastIntel) {
     check_for_freeze_on_smi();
   }
-  if (uarch == AMDZen) {
+  if (uarch >= AMDZen && uarch <= LastAMD) {
     check_for_zen_speclockmap();
   }
 }