perf list: Also append PMU name in verbose mode

When listing in verbose mode, the long description is used but the PMU
name isn't appended. There doesn't seem to be a reason to exclude it
when asking for more information, so use the same print block for both
long and short descriptions.

Before:
  $ perf list -v
  ...
  inst_retired
       [Instruction architecturally executed]

After:
  $ perf list -v
  ...
   inst_retired
       [Instruction architecturally executed. Unit: armv8_cortex_a57]

Signed-off-by: James Clark <james.clark@linaro.org>
Reviewed-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20250219151622.1097289-1-james.clark@linaro.org


Signed-off-by: Namhyung Kim <namhyung@kernel.org>