perf arm-spe: Add more sub classes for operation packet

For the operation type packet payload with load/store class, it misses
to support these sub classes:

  - A load/store targeting the general-purpose registers;
  - A load/store targeting unspecified registers;
  - The ARMv8.4 nested virtualisation extension can redirect system
    register accesses to a memory page controlled by the hypervisor.
    The SPE profiling feature in newer implementations can tag those
    memory accesses accordingly.

Add the bit pattern describing load/store sub classes, so that the perf
tool can decode it properly.

Inspired by Andre Przywara, refined the commit log and code for more
clear description.

Co-developed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Leo Yan <leo.yan@linaro.org>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Acked-by: Will Deacon <will@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Al Grant <Al.Grant@arm.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Dave Martin <Dave.Martin@arm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wei Li <liwei391@huawei.com>
Link: https://lore.kernel.org/r/20201119152441.6972-15-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

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