This is just a shortcut to have 'type' in the sort key and use more
compact output format like below.

  $ perf mem report -T
  ...
  #
  # Overhead       Samples  Memory access                            Snoop         TLB access              Data Type
  # ........  ............  .......................................  ............  ......................  .........
  #
      14.84%            22  L1 hit                                   None          L1 or L2 hit            (unknown)
       7.68%             8  LFB/MAB hit                              None          L1 or L2 hit            (unknown)
       7.17%             3  RAM hit                                  Hit           L2 miss                 (unknown)
       6.29%            12  L1 hit                                   None          L1 or L2 hit            (stack operation)
       4.85%             5  RAM hit                                  Hit           L1 or L2 hit            (unknown)
       3.97%             5  LFB/MAB hit                              None          L1 or L2 hit            struct psi_group_cpu
       3.18%             3  LFB/MAB hit                              None          L1 or L2 hit            (stack operation)
       2.58%             3  L1 hit                                   None          L1 or L2 hit            unsigned int
       2.36%             2  L1 hit                                   None          L1 or L2 hit            struct
       2.31%             2  L1 hit                                   None          L1 or L2 hit            struct psi_group_cpu
  ...

Users also can use their own sort keys and -T option makes sure it has
the 'type' sort key at the end.

  $ perf mem report -T -s mem
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20240731235505.710436-7-namhyung@kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>