Running "perf list" on powerpc fails with segfault as below:

   $ ./perf list
   Segmentation fault (core dumped)
   $

This happens because of duplicate events in the JSON list.  The powerpc
JSON event list contains some event with same event name, but different
event code. They are:

- PM_INST_FROM_L3MISS (Present in datasource and frontend)
- PM_MRK_DATA_FROM_L2MISS (Present in datasource and marked)
- PM_MRK_INST_FROM_L3MISS (Present in datasource and marked)
- PM_MRK_DATA_FROM_L3MISS (Present in datasource and marked)

pmu_events_table__num_events() uses the value from table_pmu->num_entries
which includes duplicate events as well. This causes issue during "perf
list" and results in a segmentation fault.

Since both event codes are valid, append _DSRC to the Data Source events
(datasource.json), so that they would have a unique name.

Also add PM_DATA_FROM_L2MISS_DSRC and PM_DATA_FROM_L3MISS_DSRC events.

With the fix, 'perf list' works as expected.

Fixes: fc143580 ("perf vendor events power10: Update JSON/events")
Signed-off-by: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Tested-by: Disha Goel <disgoel@linux.ibm.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Disha Goel <disgoel@linux.vnet.ibm.com>
Cc: Ian Rogers <irogers@google.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20231123160110.94090-1-atrajeev@linux.vnet.ibm.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>