perf vendor events power9: Fix commas so PMU event files are valid JSON

No functional change.

Remove extra commas in the power9 JSON files so that the files
can be parsed and validated by other utilities such as Python
that fail to parse invalid JSON.

Before:

  $ diffstat -l -p1 /wb/1.patch | while read filename ; do echo $filename ; cat $filename | json_verify ; done
  tools/perf/pmu-events/arch/powerpc/power9/cache.json
  parse error: invalid object key (must be a string)
                                          [   {,     "EventCode": "0x300
                       (right here) ------^
  JSON is invalid
  tools/perf/pmu-events/arch/powerpc/power9/floating-point.json
  parse error: invalid object key (must be a string)
                                          [   {,     "EventCode": "0x141
                       (right here) ------^
  JSON is invalid
  tools/perf/pmu-events/arch/powerpc/power9/frontend.json
  parse error: invalid object key (must be a string)
                                          [   {,     "EventCode": "0x250
                       (right here) ------^
  JSON is invalid
  tools/perf/pmu-events/arch/powerpc/power9/marked.json
  parse error: invalid object key (must be a string)
                                          [   {,     "EventCode": "0x301
                       (right here) ------^
  JSON is invalid
  tools/perf/pmu-events/arch/powerpc/power9/memory.json
  parse error: invalid object key (must be a string)
                                          [   {,     "EventCode": "0x300
                       (right here) ------^
  JSON is invalid
  tools/perf/pmu-events/arch/powerpc/power9/other.json
  parse error: invalid object key (must be a string)
                                          [   {,     "EventCode": "0x308
                       (right here) ------^
  JSON is invalid
  tools/perf/pmu-events/arch/powerpc/power9/pipeline.json
  parse error: invalid object key (must be a string)
                                          [   {,     "EventCode": "0x4D0
                       (right here) ------^
  JSON is invalid
  tools/perf/pmu-events/arch/powerpc/power9/pmc.json
  parse error: invalid object key (must be a string)
                                          [   {,     "EventCode": "0x200
                       (right here) ------^
  JSON is invalid
  tools/perf/pmu-events/arch/powerpc/power9/translation.json
  parse error: invalid object key (must be a string)
                                          [   {,     "EventCode": "0x1E"
                       (right here) ------^
  JSON is invalid
  $

After:

  $ diffstat -l -p1 /wb/1.patch | while read filename ; do echo $filename ; cat $filename | json_verify ; done
  tools/perf/pmu-events/arch/powerpc/power9/cache.json
  JSON is valid
  tools/perf/pmu-events/arch/powerpc/power9/floating-point.json
  JSON is valid
  tools/perf/pmu-events/arch/powerpc/power9/frontend.json
  JSON is valid
  tools/perf/pmu-events/arch/powerpc/power9/marked.json
  JSON is valid
  tools/perf/pmu-events/arch/powerpc/power9/memory.json
  JSON is valid
  tools/perf/pmu-events/arch/powerpc/power9/other.json
  JSON is valid
  tools/perf/pmu-events/arch/powerpc/power9/pipeline.json
  JSON is valid
  tools/perf/pmu-events/arch/powerpc/power9/pmc.json
  JSON is valid
  tools/perf/pmu-events/arch/powerpc/power9/translation.json
  JSON is valid
  $

Signed-off-by: James Clark <james.clark@arm.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kevin Mooney <kevin.mooney@arm.com>
Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Cc: Mamatha Inamdar <mamatha4@linux.vnet.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Cc: nd@arm.com
Link: http://lore.kernel.org/lkml/20191112160342.26470-3-james.clark@arm.com


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>