perf vendor events: Add Arm Neoverse V2 PMU events

perf vendor events: Add Arm Neoverse V2 PMU events

Rename the neoverse-n2 folder to make it clear that it includes V2, and
add V2 to mapfile.csv. V2 has the same events as N2, visible by running
the following command in the ARM-software/data github repo [1]:

  diff pmu/neoverse-v2.json pmu/neoverse-n2.json | grep code

Testing:

  $ perf test pmu

  10: PMU events                                           :
  10.1: PMU event table sanity                             : Ok
  10.2: PMU event map aliases                              : Ok
  10.3: Parsing of PMU event table metrics                 : Ok
  10.4: Parsing of PMU event table metrics with fake PMUs  : Ok

[1]: https://github.com/ARM-software/data

Reviewed-by: Nick Forrington <nick.forrington@arm.com>
Signed-off-by: James Clark <james.clark@arm.com>
Cc: Al Grant <al.grant@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.garry@huawei.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20221020134512.1345013-1-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>